Avoid _t in identifier names, _t is reserved by POSIX.

patch by Jai Menon, jmenon86 gmail com

Originally committed as revision 16098 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/iff.c

@@ -52,7 +52,7 @@
 
 #define PACKET_SIZE 1024
 
-typedef enum {COMP_NONE, COMP_FIB, COMP_EXP} svx8_compression_t;
+typedef enum {COMP_NONE, COMP_FIB, COMP_EXP} svx8_compression_type;
 
 typedef struct {
     uint32_t  body_size;