Fix some errors found by static analysis

Fixes items 10, 16 and 19 from PVS-Studio blog post
in #24014.

main/tests/test_math.cpp

@@ -444,14 +444,11 @@ MainLoop *test() {
 		float bb = (rgbe >> 18) & 0x1ff;
 		float eb = (rgbe >> 27);
 		float mb = Math::pow(2, eb - 15.0 - 9.0);
-		;
 		float rd = rb * mb;
 		float gd = gb * mb;
 		float bd = bb * mb;
 
 		print_line("RGBE: " + Color(rd, gd, bd));
-
-		return NULL;
 	}
 
 	print_line("Dvectors: " + itos(MemoryPool::allocs_used));
@@ -482,8 +479,6 @@ MainLoop *test() {
 	print_line("later Mem used: " + itos(MemoryPool::total_memory));
 	print_line("Mlater Ax mem used: " + itos(MemoryPool::max_memory));
 
-	return NULL;
-
 	List<String> cmdlargs = OS::get_singleton()->get_cmdline_args();
 
 	if (cmdlargs.empty()) {
@@ -492,6 +487,11 @@ MainLoop *test() {
 	}
 
 	String test = cmdlargs.back()->get();
+	if (test == "math") {
+		// Not a file name but the test name, abort.
+		// FIXME: This test is ugly as heck, needs fixing :)
+		return NULL;
+	}
 
 	FileAccess *fa = FileAccess::open(test, FileAccess::READ);
 
@@ -516,8 +516,6 @@ MainLoop *test() {
 		print_line("Found class: " + getclass.get_class());
 	}
 
-	return NULL;
-
 	{
 
 		Vector<int> hashes;
@@ -557,13 +555,10 @@ MainLoop *test() {
 		}
 
 		print_line("DONE");
-
-		return NULL;
 	}
-	{
 
+	{
 		print_line("NUM: " + itos(-128));
-		return NULL;
 	}
 
 	{
@@ -593,7 +588,6 @@ MainLoop *test() {
 		print_line("after v: " + v + " a: " + rtos(a));
 	}
 
-	return NULL;
 	String ret;
 
 	List<String> args;
@@ -602,7 +596,6 @@ MainLoop *test() {
 	print_line("error: " + itos(err));
 	print_line(ret);
 
-	return NULL;
 	Basis m3;
 	m3.rotate(Vector3(1, 0, 0), 0.2);
 	m3.rotate(Vector3(0, 1, 0), 1.77);
@@ -611,17 +604,13 @@ MainLoop *test() {
 	m32.set_euler(m3.get_euler());
 	print_line("ELEULEEEEEEEEEEEEEEEEEER: " + m3.get_euler() + " vs " + m32.get_euler());
 
-	return NULL;
-
 	{
-
 		Dictionary d;
 		d["momo"] = 1;
 		Dictionary b = d;
 		b["44"] = 4;
 	}
 
-	return NULL;
 	print_line("inters: " + rtos(Geometry::segment_intersects_circle(Vector2(-5, 0), Vector2(-2, 0), Vector2(), 1.0)));
 
 	print_line("cross: " + Vector3(1, 2, 3).cross(Vector3(4, 5, 7)));

modules/csg/csg_shape.cpp

@@ -1132,9 +1132,9 @@ CSGBrush *CSGBox::_build_brush() {
 					for (int k = 0; k < 3; k++) {
 
 						if (i < 3)
-							face_points[j][(i + k) % 3] = v[k] * (i >= 3 ? -1 : 1);
+							face_points[j][(i + k) % 3] = v[k];
 						else
-							face_points[3 - j][(i + k) % 3] = v[k] * (i >= 3 ? -1 : 1);
+							face_points[3 - j][(i + k) % 3] = -v[k];
 					}
 				}
 

scene/animation/animation_blend_space_1d.cpp

@@ -110,7 +110,7 @@ void AnimationNodeBlendSpace1D::add_blend_point(const Ref<AnimationRootNode> &p_
 	if (p_at_index == -1 || p_at_index == blend_points_used) {
 		p_at_index = blend_points_used;
 	} else {
-		for (int i = blend_points_used - 1; i > p_at_index; i++) {
+		for (int i = blend_points_used - 1; i > p_at_index; i--) {
 			blend_points[i] = blend_points[i - 1];
 		}
 	}