- I've fixed possibles random hangs in DC mode.

- I've fixed hangs in DC mode in (Simpsons, Monkey Island, Pokemon XD, etc)
- I've implemented accurate manage of Pixel Engine Interrupts, now the GPU loop is stopped when a PE Interrupt needs to be managed and resume when Pixel Engine finish,
I think now, the Fifo in DC mode is more accurate than SC mode. :)

Time to close the big fifo Issue 3694 (snif), please if you have a possible fifo issue report this like a game issue.

I was working with Skid_AU together, especially thanks for him.

Test a lot all games, and compare the performance with the master maybe this accuracy has a cost (not a lot).
I think now the fifo is very stable, overflow fixed, random hang fixed, if you have a game with a hang with this rev and not in master please report this.

Source/Core/VideoCommon/Src/Fifo.cpp

@@ -22,6 +22,7 @@
 #include "Atomic.h"
 #include "OpcodeDecoding.h"
 #include "CommandProcessor.h"
+#include "PixelEngine.h"
 #include "ChunkFile.h"
 #include "Fifo.h"
 #include "HW/Memmap.h"
@@ -137,7 +138,7 @@ void RunGpuLoop()
 				
 		CommandProcessor::SetCpStatus();
 		// check if we are able to run this buffer	
-		while (!CommandProcessor::interruptWaiting && fifo.bFF_GPReadEnable && fifo.CPReadWriteDistance && !AtBreakpoint())
+		while (GpuRunningState && !CommandProcessor::interruptWaiting && fifo.bFF_GPReadEnable && fifo.CPReadWriteDistance && !AtBreakpoint() && !PixelEngine::WaitingForPEInterrupt())
 		{
 			if (!GpuRunningState) break;