Check for file size change at every read (improve reading of downloading

files).

modules/access/mmap.c

@@ -163,9 +163,7 @@ static block_t *Block (access_t *p_access)
 {
     access_sys_t *p_sys = p_access->p_sys;
 
-    if ((uint64_t)p_access->info.i_pos >= (uint64_t)p_access->info.i_size)
-    {
-        /* End of file - check if file size changed... */
+    /* Check if file size changed... */
     struct stat st;
 
     if ((fstat (p_sys->fd, &st) == 0)
@@ -175,14 +173,13 @@ static block_t *Block (access_t *p_access)
         p_access->info.i_update |= INPUT_UPDATE_SIZE;
     }
 
-        /* Really at end of file then */
     if ((uint64_t)p_access->info.i_pos >= (uint64_t)p_access->info.i_size)
     {
+        /* We are at end of file */
         p_access->info.b_eof = true;
         msg_Dbg (p_access, "at end of memory mapped file");
         return NULL;
     }
-    }
 
 #ifdef MMAP_DEBUG
     int64_t dbgpos = lseek (p_sys->fd, 0, SEEK_CUR);