prune #include, fix warning.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73847 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/TGLexer.cpp b/utils/TableGen/TGLexer.cpp
index a1ccdbe..27669ca 100644
--- a/utils/TableGen/TGLexer.cpp
+++ b/utils/TableGen/TGLexer.cpp
@@ -280,7 +280,7 @@
 
   
   CurBuffer = SrcMgr.AddIncludeFile(Filename, SMLoc::getFromPointer(CurPtr));
-  if (CurBuffer == ~0U) {
+  if (CurBuffer == -1) {
     PrintError(getLoc(), "Could not find include file '" + Filename + "'");
     return true;
   }