avformat/utils: Remove redundant check

This check is outdated because the caller doesn't need to check that
the multiplication overflows when using av_realloc_array() (the code
in question used av_realloc() before that); furthermore, the check
is also a remnant of the time in which our allocation functions
didn't use size_t parameters.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavformat/utils.c

@@ -4493,9 +4493,10 @@ AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
     int i;
     AVStream **streams;
 
-    if (s->nb_streams >= FFMIN(s->max_streams, INT_MAX/sizeof(*streams))) {
-        if (s->max_streams < INT_MAX/sizeof(*streams))
-            av_log(s, AV_LOG_ERROR, "Number of streams exceeds max_streams parameter (%d), see the documentation if you wish to increase it\n", s->max_streams);
+    if (s->nb_streams >= s->max_streams) {
+        av_log(s, AV_LOG_ERROR, "Number of streams exceeds max_streams parameter"
+               " (%d), see the documentation if you wish to increase it\n",
+               s->max_streams);
         return NULL;
     }
     streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));