Added support for multiboot dols. This allows demo discs, bonus discs etc to be played.

* Flushed the JIT cache on "ICFI" (Flush Instruction Cache)
* Made all instructions one cycle in duration

Fixes issue 233

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6088 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/DebuggerWX/Src/CodeWindow.cpp

@@ -560,7 +560,10 @@ void CCodeWindow::OnCPUMode(wxCommandEvent& event)
 	}
 
 	// Clear the JIT cache to enable these changes
-	jit->ClearCache();
+	if (jit)
+	{
+		jit->ClearCache();
+	}
 	// Update
 	UpdateButtonStates();
 }