Changes to build successfully with GCC 3.02


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1503 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/ConstantProp.cpp b/lib/Transforms/Scalar/ConstantProp.cpp
index c267d95..a961bad 100644
--- a/lib/Transforms/Scalar/ConstantProp.cpp
+++ b/lib/Transforms/Scalar/ConstantProp.cpp
@@ -159,7 +159,7 @@
 bool opt::ConstantPropogation::doConstantPropogation(BasicBlock *BB,
 						     BasicBlock::iterator &II) {
   Instruction *Inst = *II;
-  if (BinaryOperator *BInst = dyn_cast<BinaryOperator>(Inst)) {
+  if (isa<BinaryOperator>(Inst)) {
     Constant *D1 = dyn_cast<Constant>(Inst->getOperand(0));
     Constant *D2 = dyn_cast<Constant>(Inst->getOperand(1));