Print a space after the AVClass prefix.

This improves readability a bit.

Originally committed as revision 23767 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/log.c

@@ -94,10 +94,10 @@ void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
         if(avc->version >= (50<<16 | 15<<8 | 3) && avc->parent_log_context_offset){
             AVClass** parent= *(AVClass***)(((uint8_t*)ptr) + avc->parent_log_context_offset);
             if(parent && *parent){
-                snprintf(line, sizeof(line), "[%s @ %p]", (*parent)->item_name(parent), parent);
+                snprintf(line, sizeof(line), "[%s @ %p] ", (*parent)->item_name(parent), parent);
             }
         }
-        snprintf(line + strlen(line), sizeof(line) - strlen(line), "[%s @ %p]", avc->item_name(ptr), ptr);
+        snprintf(line + strlen(line), sizeof(line) - strlen(line), "[%s @ %p] ", avc->item_name(ptr), ptr);
     }
 
     vsnprintf(line + strlen(line), sizeof(line) - strlen(line), fmt, vl);