[F] Fixing checking rule

code/StandardShapes.cpp

@@ -121,8 +121,7 @@ void Subdivide(std::vector<aiVector3D>& positions)
 aiMesh* StandardShapes::MakeMesh(const std::vector<aiVector3D>& positions,
     unsigned int numIndices)
 {
-    if (positions.size() & numIndices || positions.empty() || !numIndices)
-        return NULL;
+    if (positions.empty() || !numIndices) return NULL;
 
     // Determine which kinds of primitives the mesh consists of
     aiMesh* out = new aiMesh();