Added g_hash_table_contains for glib < 2.32

src/common.c

@@ -81,12 +81,21 @@ p_list_free_full(GList *items, GDestroyNotify free_func)
 gboolean
 p_hash_table_add(GHashTable *hash_table, gpointer key)
 {
+    // doesn't handle when key exists, but value == NULL
     gpointer found = g_hash_table_lookup(hash_table, key);
     g_hash_table_replace(hash_table, key, key);
 
     return (found == NULL);
 }
 
+gboolean
+p_hash_table_contains(GHashTable  *hash_table, gconstpointer key)
+{
+    // doesn't handle when key exists, but value == NULL
+    gpointer found = g_hash_table_lookup(hash_table, key);
+    return (found != NULL);
+}
+
 gboolean
 create_dir(char *name)
 {