The thread safety stuff is only needed for GTK

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@419 0fc631ac-6414-0410-93d0-97cfa31319b6

src/script/image.hpp

@@ -47,7 +47,7 @@ class ScriptableImage {
 	}
 
 	/// Can this be safely generated from another thread?
-	bool threadSafe() const {return value != nullptr ? value->threadSafe() : false; }
+	inline bool threadSafe() const { return !value || value->threadSafe(); }
 	
   private:
 	OptionalScript  script;		///< The script, not really optional