TileSet: Don't error out on tile_ getters with wrong shape id

Partial revert of 02319dceb2e17184eb765c67719a306f56dafc1b,
previous code handled this cases without errors and the TileSet and
TileSetEditorPlugin are written with the expectation that those will
not error out.

This is a bit wonky and these classes should likely be refactored,
but until then it's best to keep things as they were.

Fixes #29962.

scene/resources/tile_set.cpp

@@ -721,7 +721,7 @@ void TileSet::tile_set_shape(int p_id, int p_shape_id, const Ref<Shape2D> &p_sha
 	ERR_FAIL_COND(!tile_map.has(p_id));
 	ERR_FAIL_COND(p_shape_id < 0);
 
-	if (tile_map[p_id].shapes_data.size() <= p_shape_id)
+	if (p_shape_id >= tile_map[p_id].shapes_data.size())
 		tile_map[p_id].shapes_data.resize(p_shape_id + 1);
 	tile_map[p_id].shapes_data.write[p_shape_id].shape = p_shape;
 	_decompose_convex_shape(p_shape);
@@ -731,17 +731,17 @@ void TileSet::tile_set_shape(int p_id, int p_shape_id, const Ref<Shape2D> &p_sha
 Ref<Shape2D> TileSet::tile_get_shape(int p_id, int p_shape_id) const {
 
 	ERR_FAIL_COND_V(!tile_map.has(p_id), Ref<Shape2D>());
-	ERR_FAIL_INDEX_V(p_shape_id, tile_map[p_id].shapes_data.size(), Ref<Shape2D>());
+	if (p_shape_id < tile_map[p_id].shapes_data.size())
+		return tile_map[p_id].shapes_data[p_shape_id].shape;
 
-	return tile_map[p_id].shapes_data[p_shape_id].shape;
+	return Ref<Shape2D>();
 }
 
 void TileSet::tile_set_shape_transform(int p_id, int p_shape_id, const Transform2D &p_offset) {
 
 	ERR_FAIL_COND(!tile_map.has(p_id));
-	ERR_FAIL_INDEX(p_shape_id, tile_map[p_id].shapes_data.size());
 
-	if (tile_map[p_id].shapes_data.size() <= p_shape_id)
+	if (p_shape_id >= tile_map[p_id].shapes_data.size())
 		tile_map[p_id].shapes_data.resize(p_shape_id + 1);
 	tile_map[p_id].shapes_data.write[p_shape_id].shape_transform = p_offset;
 	emit_changed();
@@ -750,9 +750,10 @@ void TileSet::tile_set_shape_transform(int p_id, int p_shape_id, const Transform
 Transform2D TileSet::tile_get_shape_transform(int p_id, int p_shape_id) const {
 
 	ERR_FAIL_COND_V(!tile_map.has(p_id), Transform2D());
-	ERR_FAIL_INDEX_V(p_shape_id, tile_map[p_id].shapes_data.size(), Transform2D());
+	if (p_shape_id < tile_map[p_id].shapes_data.size())
+		return tile_map[p_id].shapes_data[p_shape_id].shape_transform;
 
-	return tile_map[p_id].shapes_data[p_shape_id].shape_transform;
+	return Transform2D();
 }
 
 void TileSet::tile_set_shape_offset(int p_id, int p_shape_id, const Vector2 &p_offset) {
@@ -770,7 +771,7 @@ void TileSet::tile_set_shape_one_way(int p_id, int p_shape_id, const bool p_one_
 	ERR_FAIL_COND(!tile_map.has(p_id));
 	ERR_FAIL_COND(p_shape_id < 0);
 
-	if (tile_map[p_id].shapes_data.size() <= p_shape_id)
+	if (p_shape_id >= tile_map[p_id].shapes_data.size())
 		tile_map[p_id].shapes_data.resize(p_shape_id + 1);
 	tile_map[p_id].shapes_data.write[p_shape_id].one_way_collision = p_one_way;
 	emit_changed();
@@ -779,9 +780,10 @@ void TileSet::tile_set_shape_one_way(int p_id, int p_shape_id, const bool p_one_
 bool TileSet::tile_get_shape_one_way(int p_id, int p_shape_id) const {
 
 	ERR_FAIL_COND_V(!tile_map.has(p_id), false);
-	ERR_FAIL_INDEX_V(p_shape_id, tile_map[p_id].shapes_data.size(), false);
+	if (p_shape_id < tile_map[p_id].shapes_data.size())
+		return tile_map[p_id].shapes_data[p_shape_id].one_way_collision;
 
-	return tile_map[p_id].shapes_data[p_shape_id].one_way_collision;
+	return false;
 }
 
 void TileSet::tile_set_shape_one_way_margin(int p_id, int p_shape_id, float p_margin) {
@@ -789,7 +791,7 @@ void TileSet::tile_set_shape_one_way_margin(int p_id, int p_shape_id, float p_ma
 	ERR_FAIL_COND(!tile_map.has(p_id));
 	ERR_FAIL_COND(p_shape_id < 0);
 
-	if (tile_map[p_id].shapes_data.size() <= p_shape_id)
+	if (p_shape_id >= tile_map[p_id].shapes_data.size())
 		tile_map[p_id].shapes_data.resize(p_shape_id + 1);
 	tile_map[p_id].shapes_data.write[p_shape_id].one_way_collision_margin = p_margin;
 	emit_changed();
@@ -798,9 +800,10 @@ void TileSet::tile_set_shape_one_way_margin(int p_id, int p_shape_id, float p_ma
 float TileSet::tile_get_shape_one_way_margin(int p_id, int p_shape_id) const {
 
 	ERR_FAIL_COND_V(!tile_map.has(p_id), 0);
-	ERR_FAIL_INDEX_V(p_shape_id, tile_map[p_id].shapes_data.size(), 0.0);
+	if (p_shape_id < tile_map[p_id].shapes_data.size())
+		return tile_map[p_id].shapes_data[p_shape_id].one_way_collision_margin;
 
-	return tile_map[p_id].shapes_data[p_shape_id].one_way_collision_margin;
+	return 0;
 }
 
 void TileSet::tile_set_light_occluder(int p_id, const Ref<OccluderPolygon2D> &p_light_occluder) {