cosmetics: Consistently use C-style comments in #endif preprocessor directives.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@13047 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/acelp_math.h

@@ -72,4 +72,4 @@ static int sum_of_squares(const int16_t* speech, int length, int offset, int shi
     return sum;
 }
 
-#endif // FFMPEG_ACELP_MATH_H
+#endif /* FFMPEG_ACELP_MATH_H */