Fixed compilation warning on Linux by fixing the type of a return value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137913 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/lto/LTOCodeGenerator.cpp b/tools/lto/LTOCodeGenerator.cpp
index 8b4b57c..cff6cb1 100644
--- a/tools/lto/LTOCodeGenerator.cpp
+++ b/tools/lto/LTOCodeGenerator.cpp
@@ -193,7 +193,7 @@
   bool genResult = false;
   tool_output_file objFile(uniqueObjPath.c_str(), errMsg);
   if (!errMsg.empty())
-    return NULL;
+    return true;
   genResult = this->generateObjectFile(objFile.os(), errMsg);
   objFile.os().close();
   if (objFile.os().has_error()) {