Some more leak hunting/housekeeping, probably wont affect Issue 2184 in a noticeable way tho.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5046 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/Common/Src/x64Emitter.h

@@ -233,6 +233,7 @@ protected:
 public:
 	XEmitter() { code = NULL; }
 	XEmitter(u8 *code_ptr) { code = code_ptr; }
+	virtual ~XEmitter() {}
 
 	void WriteModRM(int mod, int rm, int reg);
 	void WriteSIB(int scale, int index, int base);