Cast unused parameter to void.

llvm-svn: 132641
diff --git a/llvm/include/llvm-c/Core.h b/llvm/include/llvm-c/Core.h
index 70fc699..2eccc11 100644
--- a/llvm/include/llvm-c/Core.h
+++ b/llvm/include/llvm-c/Core.h
@@ -1166,6 +1166,7 @@
     for (LLVMValueRef *I = Vals, *E = Vals + Length; I != E; ++I)
       cast<T>(*I);
     #endif
+    (void)Length;
     return reinterpret_cast<T**>(Vals);
   }