Avoid adding hidden EDX operand on IRDB uses of 8-bit multiply opcodes.

src/base/SMPInstr.cpp

@@ -19765,7 +19765,7 @@ bool SMPInstr::BuildMultiplyDivideRTL(SMPoperator BinaryOp) {
 		// See the x86 ISA manuals for DIV, IDIV, IMUL, MUL opcodes to see all the cases.
 		ImplicitDEFs = x86ImulCase ? (!ByteSourceOperand && InvisibleOperand) : (!ByteSourceOperand);
 		// IRDB does not have the invisible operands, but it has an implicit DEFs field.
-		if (!ImplicitDEFs) {
+		if (!ImplicitDEFs && (!ByteSourceOperand)) {
 			ImplicitDEFs = this->STARSInstPtr->HasImplicitlyModifiedRegs();
 		}
 		this->RTL.push_back(TempRT);