msecstotimestr: fix negative numbers handling

src/misc/mtime.c

@@ -127,6 +127,13 @@ char *mstrtime( char *psz_buffer, mtime_t date )
  */
 char *secstotimestr( char *psz_buffer, int32_t i_seconds )
 {
+    if( unlikely(i_seconds < 0) )
+    {
+        secstotimestr( psz_buffer + 1, -i_seconds );
+        *psz_buffer = '-';
+        return psz_buffer;
+    }
+
     div_t d;
 
     d = div( i_seconds, 60 );
@@ -137,8 +144,8 @@ char *secstotimestr( char *psz_buffer, int32_t i_seconds )
         snprintf( psz_buffer, MSTRTIME_MAX_SIZE, "%u:%02u:%02u",
                  d.quot, d.rem, i_seconds );
     else
-         snprintf( psz_buffer, MSTRTIME_MAX_SIZE, "%02u:%02u",
-                   d.rem, i_seconds );
+        snprintf( psz_buffer, MSTRTIME_MAX_SIZE, "%02u:%02u",
+                  d.rem, i_seconds );
     return psz_buffer;
 }