virtiofsd: Changed allocation of lo_map_elems to GLib's functions

Replaced (re)allocation of lo_map_elem structs from realloc() to
GLib's g_try_realloc_n() and replaced the respective free() call
with a g_free().

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20210420154643.58439-5-ma.mandourr@gmail.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

tools/virtiofsd/passthrough_ll.c

@@ -406,7 +406,7 @@ static void lo_map_init(struct lo_map *map)
 
 static void lo_map_destroy(struct lo_map *map)
 {
-    free(map->elems);
+    g_free(map->elems);
 }
 
 static int lo_map_grow(struct lo_map *map, size_t new_nelems)
@@ -418,7 +418,7 @@ static int lo_map_grow(struct lo_map *map, size_t new_nelems)
         return 1;
     }
 
-    new_elems = realloc(map->elems, sizeof(map->elems[0]) * new_nelems);
+    new_elems = g_try_realloc_n(map->elems, new_nelems, sizeof(map->elems[0]));
     if (!new_elems) {
         return 0;
     }