libweston: allow double-loading modules

This is necessary for the test harness to be able to execute the compositor
multiple times in the same process. As we never unload opened modules, the
first compositor iteration will leave them all loaded and following compositor
iterations will then have them already loaded.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

libweston/compositor.c

@@ -7618,16 +7618,14 @@ weston_load_module(const char *name, const char *entrypoint)
 	module = dlopen(path, RTLD_NOW | RTLD_NOLOAD);
 	if (module) {
 		weston_log("Module '%s' already loaded\n", path);
-		dlclose(module);
+	} else {
-		return NULL;
-	}
-
 		weston_log("Loading module '%s'\n", path);
 		module = dlopen(path, RTLD_NOW);
 		if (!module) {
 			weston_log("Failed to load module: %s\n", dlerror());
 			return NULL;
 		}
+	}
 
 	init = dlsym(module, entrypoint);
 	if (!init) {