Fix some compiler warnings/errors. Error in llinventorymodelbackgroundfetch was introduced by partial commit.

indra/llappearance/llwearabletype.h

@@ -35,6 +35,7 @@
 class LLTranslationBridge
 {
 public:
+	virtual ~LLTranslationBridge(){};
 	virtual std::string getString(const std::string &xml_desc) = 0;
 };