Use modern variable name. ConstantUnsignedInt is long since dead. No
functional change with this patch.

llvm-svn: 34806
diff --git a/llvm/lib/VMCore/Instructions.cpp b/llvm/lib/VMCore/Instructions.cpp
index f4519d4..8c836a2 100644
--- a/llvm/lib/VMCore/Instructions.cpp
+++ b/llvm/lib/VMCore/Instructions.cpp
@@ -623,8 +623,8 @@
 }
 
 bool AllocationInst::isArrayAllocation() const {
-  if (ConstantInt *CUI = dyn_cast<ConstantInt>(getOperand(0)))
-    return CUI->getZExtValue() != 1;
+  if (ConstantInt *CI = dyn_cast<ConstantInt>(getOperand(0)))
+    return CI->getZExtValue() != 1;
   return true;
 }