flvdec: Fix indentation

Also split a long line.
Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/flvdec.c

@@ -204,8 +204,9 @@ static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream
     }
 
     if (!ret && timeslen == fileposlen)
-         for (i = 0; i < fileposlen; i++)
-             av_add_index_entry(vstream, filepositions[i], times[i]*1000, 0, 0, AVINDEX_KEYFRAME);
+        for (i = 0; i < fileposlen; i++)
+            av_add_index_entry(vstream, filepositions[i], times[i]*1000,
+                               0, 0, AVINDEX_KEYFRAME);
     else
         av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");