Video: remove enforced resolution least common multiple of 4 when dumping screenshots and not videos (only videos encoders have this limit).

NOTE: this will likely trigger FIFOCI differences.

Source/Core/VideoCommon/FrameDumper.h

@@ -33,6 +33,7 @@ public:
   void SaveScreenshot(std::string filename);
 
   bool IsFrameDumping() const;
+  int GetRequiredResolutionLeastCommonMultiple() const;
 
   void DoState(PointerWrap& p);