Silence one icc warning:

variable "..." is used before its value is set Originally committed as revision 17127 to svn://svn.ffmpeg.org/ffmpeg/trunk

Silence one icc warning:
0dd89666 · Carl Eugen Hoyos · 99b170f8 · 0dd89666
Commit 0dd89666 authored 16 years ago by Carl Eugen Hoyos
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -102,7 +102,7 @@
 #endif
 #ifndef av_uninit
-#if defined(__GNUC__)
+#if defined(__GNUC__) && !defined(__ICC)
 #    define av_uninit(x) x=x
 #else
 #    define av_uninit(x) x