Fix >>=

>>= should be unsigned when the left operand is unsigned int. The right
operand isn't important here.

src/cmd/smlrc/smlrc.c

@@ -4215,9 +4215,11 @@ int exprval(int* idx, int* ExprTypeSynPtr, int* ConstExpr)
         {
         case tokAssignDiv: t = tokAssignUDiv; break;
         case tokAssignMod: t = tokAssignUMod; break;
-        case tokAssignRSh: t = tokAssignURSh; break;
+        case tokAssignRSh:
+          if (SyntaxStack[*ExprTypeSynPtr][0] == tokUnsigned)
+            t = tokAssignURSh;
+          break;
         }
-        if (t != tok)
         stack[oldIdxRight + 1 - (oldSpRight - sp)][0] = t;
       }
 
@@ -8152,4 +8154,3 @@ int main(int argc, char** argv)
 
   return 0;
 }
-