chore: portal-impl - fix linting issues to code style

src/portal-impl.c

@@ -489,11 +489,12 @@ load_portal_configuration (gboolean opt_verbose)
 }
 
 PortalInterface *
-find_matching_iface_config (const char *interface) {
+find_matching_iface_config (const char *interface)
+{
   if (config == NULL)
     return NULL;
 
-  for (int i = 0; i < config->n_ifaces; i++)
+  for (size_t i = 0; i < config->n_ifaces; i++)
     {
       PortalInterface *iface = config->interfaces[i];
 
@@ -505,8 +506,9 @@ find_matching_iface_config (const char *interface) {
 }
 
 static gboolean
-portal_interface_prefers_none (const char *interface) {
-  const PortalInterface *iface = find_matching_iface_config(interface);
+portal_interface_prefers_none (const char *interface)
+{
+  const PortalInterface *iface = find_matching_iface_config (interface);
 
   if (iface != NULL && g_strv_contains ((const char * const *) iface->portals, "none"))
     {