trivial: fix a compile error which wasn't detected and kept crashing polkitd

src/Makefile.am

@@ -188,6 +188,7 @@ libpackagekit_action_lookup_la_CFLAGS =				\
 	-DPOLKIT_BACKEND_I_KNOW_API_IS_SUBJECT_TO_CHANGE	\
 	-DG_LOG_DOMAIN=\"PackageKit-Action-Lookup\"		\
 	$(POLKIT_BACKEND_1_CFLAGS)				\
+	$(WARNINGFLAGS_C)					\
 	$(NULL)
 
 libpackagekit_action_lookup_la_LDFLAGS =			\

src/pk-polkit-action-lookup.c

@@ -292,7 +292,7 @@ pk_action_lookup_package_ids_to_string (gchar **package_ids)
 			names_str = g_strdup (split[PK_PACKAGE_ID_NAME]);
 		}
 		g_ptr_array_add (array, names_str);
-		g_strfree (split);
+		g_strfreev (split);
 	}
 
 	/* create string */