unify include guard defines, __$FILENAME__

without the underscores these clogged up the namespace for autocompleation which was annoying.

source/blender/python/intern/bpy_operator_wrap.h

@@ -24,8 +24,8 @@
  *  \ingroup pythonintern
  */
 
-#ifndef BPY_OPERATOR_WRAP_H
-#define BPY_OPERATOR_WRAP_H
+#ifndef __BPY_OPERATOR_WRAP_H__
+#define __BPY_OPERATOR_WRAP_H__
 
 struct wmOperatorType;