cosmetics: Use C-style comments in #endif directives.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@13442 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/acelp_vectors.h

@@ -148,4 +148,4 @@ void ff_acelp_weighted_vector_sum(
         int shift,
         int length);
 
-#endif // FFMPEG_ACELP_VECTORS_H
+#endif /* FFMPEG_ACELP_VECTORS_H */