Suppress an unused variable warning when assertions are off;

remove some trailing whitespace while there.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93008 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/Reassociate.cpp

@@ -809,6 +809,7 @@ Value *Reassociate::OptimizeAdd(Instruction *I,
     // handle cases that require multiple factoring steps, such as this:
     // A*A*B + A*A*C   -->   A*(A*B+A*C)   -->   A*(A*(B+C))
     assert(NumAddedValues > 1 && "Each occurrence should contribute a value");
+    (void)NumAddedValues;
     V = ReassociateExpression(cast<BinaryOperator>(V));
 
     // Create the multiply.