Add better savestate error handling.

Aborts when it can't load.

Core/HLE/sceKernel.cpp

@@ -165,7 +165,10 @@ void __KernelDoState(PointerWrap &p)
 	std::string git_version = PPSSPP_GIT_VERSION;
 	p.Do(git_version);
 	if (git_version != PPSSPP_GIT_VERSION)
+	{
+		p.SetError(p.ERROR_WARNING);
 		WARN_LOG(HLE, "Warning: this savestate was generated by a different version of PPSSPP.  It may not load properly.");
+	}
 
 	p.Do(kernelRunning);
 	kernelObjects.DoState(p);
@@ -462,7 +465,11 @@ void KernelObjectPool::DoState(PointerWrap &p)
 	p.Do(_maxCount);
 
 	if (_maxCount != maxCount)
+	{
+		p.SetError(p.ERROR_FAILURE);
 		ERROR_LOG(HLE, "Unable to load state: different kernel object storage.");
+		return;
+	}
 
 	if (p.mode == p.MODE_READ)
 	{