AnyImageImporter: don't expect metadata to be present too early.

The check that the plugin is loadable should happen before this, not
after. All other importer plugins do that already.

src/MagnumPlugins/AnyImageImporter/AnyImageImporter.cpp

@@ -118,6 +118,12 @@ void AnyImageImporter::doOpenFile(const std::string& filename) {
         Error{} << "Trade::AnyImageImporter::openFile(): cannot determine the format of" << filename;
         return;
     }
+
+    /* Try to load the plugin */
+    if(!(manager()->load(plugin) & PluginManager::LoadState::Loaded)) {
+        Error{} << "Trade::AnyImageImporter::openFile(): cannot load the" << plugin << "plugin";
+        return;
+    }
     if(flags() & ImporterFlag::Verbose) {
         Debug d;
         d << "Trade::AnyImageImporter::openFile(): using" << plugin;
@@ -127,12 +133,6 @@ void AnyImageImporter::doOpenFile(const std::string& filename) {
             d << "(provided by" << metadata->name() << Debug::nospace << ")";
     }
 
-    /* Try to load the plugin */
-    if(!(manager()->load(plugin) & PluginManager::LoadState::Loaded)) {
-        Error{} << "Trade::AnyImageImporter::openFile(): cannot load the" << plugin << "plugin";
-        return;
-    }
-
     /* Instantiate the plugin, propagate flags */
     Containers::Pointer<AbstractImporter> importer = static_cast<PluginManager::Manager<AbstractImporter>*>(manager())->instantiate(plugin);
     importer->setFlags(flags());