Fix the video software backend. (closes issue 4269)

Some warning fixes and cleanup.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@7361 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_VideoOGL/Src/VideoBackend.h

@@ -7,7 +7,7 @@
 namespace OGL
 {
 
-class VideoBackend : public VideoBackendHLE
+class VideoBackend : public VideoBackendHardware
 {
 	bool Initialize(void *&);
 	void Shutdown();