pcsx2:interpreter: always false condition

Both fields are 10 bits but the ~ operation apply on the 32 bits.
Therefore msb bits were always '1' and the condition always false.

Code is only used on the interpreter but it could explain some hangs

pcsx2/COP0.cpp

@@ -509,7 +509,7 @@ void MTC0()
 }
 
 int CPCOND0() {
-	return ((dmacRegs.stat.CIS | ~dmacRegs.pcr.CPC) == 0x3ff);
+	return (((dmacRegs.stat.CIS | ~dmacRegs.pcr.CPC) & 0x3FF) == 0x3ff);
 }
 
 //#define CPCOND0	1