Cleanup: add semicolon after PyObject_VAR_HEAD

clang-format doesn't expand macros,
add semicolon to prevent misleading formatting.

source/blender/python/gpu/gpu_py_vertex_format.h

@@ -28,7 +28,8 @@ extern PyTypeObject BPyGPUVertFormat_Type;
 #define BPyGPUVertFormat_Check(v) (Py_TYPE(v) == &BPyGPUVertFormat_Type)
 
 typedef struct BPyGPUVertFormat {
-  PyObject_VAR_HEAD struct GPUVertFormat fmt;
+  PyObject_VAR_HEAD;
+  struct GPUVertFormat fmt;
 } BPyGPUVertFormat;
 
 PyObject *BPyGPUVertFormat_CreatePyObject(struct GPUVertFormat *fmt);