Fix null pointer error in a cube template

The first parameter of four parameter method generateRotationMatrix33
expects a pointer to a Matrix33. When a 0 is passed, it is interpreted
as a null pointer that is later dereferenced to set the matrix and that
causes an error.

Author: jahav

tools/vscode-extension/templates/psyqo/cube/main.cpp

@@ -125,7 +125,7 @@ void CubeScene::frame() {
     psyqo::SoftMath::multiplyMatrix33(transform, rot, &transform);
 
     // Generate a Z-axis rotation matrix (Empty, but it's here for your use)
-    psyqo::SoftMath::generateRotationMatrix33(0, 0, psyqo::SoftMath::Axis::Z, cube.m_trig);
+    psyqo::SoftMath::generateRotationMatrix33(&rot, 0, psyqo::SoftMath::Axis::Z, cube.m_trig);
 
     // Apply the combined rotation and write it to the pseudo register for the cube's rotation
     psyqo::SoftMath::multiplyMatrix33(transform, rot, &transform);