Mark assert lines as safe in gdscript

Now calling _reduce_node_type with debugging enabled to determine
if assert line is safe. Part of doing this required the assert line
to be stored away. Now the AssertNode line is being correctly set.
Newlines are now marked safe always

(cherry picked from commit 8dc883378218f85c7d3080e6769fac7a957c5223)

modules/gdscript/gdscript_parser.cpp

@@ -2787,6 +2787,7 @@ void GDScriptParser::_parse_block(BlockNode *p_block, bool p_static) {
 					return;
 				}
 
+				_mark_line_as_safe(line);
 				NewLineNode *nl2 = alloc_node<NewLineNode>();
 				nl2->line = line;
 				p_block->statements.push_back(nl2);
@@ -3300,6 +3301,8 @@ void GDScriptParser::_parse_block(BlockNode *p_block, bool p_static) {
 					return;
 				}
 
+				int assert_line = tokenizer->get_token_line();
+
 				tokenizer->advance();
 
 				Vector<Node *> args;
@@ -3313,8 +3316,14 @@ void GDScriptParser::_parse_block(BlockNode *p_block, bool p_static) {
 					return;
 				}
 
+#ifdef DEBUG_ENABLED
+				// Mark as safe, let type check mark as unsafe if needed
+				_mark_line_as_safe(assert_line);
+				_reduce_node_type(args[0]);
+#endif
 				AssertNode *an = alloc_node<AssertNode>();
 				an->condition = _reduce_expression(args[0], p_static);
+				an->line = assert_line;
 
 				if (args.size() == 2) {
 					an->message = _reduce_expression(args[1], p_static);