Silencing an MSVC warning about mixing bool and unsigned int.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183176 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/R600/AMDGPUStructurizeCFG.cpp b/lib/Target/R600/AMDGPUStructurizeCFG.cpp
index bd947a5..d26783d 100644
--- a/lib/Target/R600/AMDGPUStructurizeCFG.cpp
+++ b/lib/Target/R600/AMDGPUStructurizeCFG.cpp
@@ -353,7 +353,7 @@
   if (Term->isConditional()) {
     Cond = Term->getCondition();
 
-    if (Idx != Invert)
+    if (Idx != (unsigned)Invert)
       Cond = invert(Cond);
   }
   return Cond;