[libclang] In visitPreprocessedEntitiesInRange we are interested in a file region
so translate the range to file locations.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147058 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CIndex.cpp b/tools/libclang/CIndex.cpp
index a5b390a..525c5fc 100644
--- a/tools/libclang/CIndex.cpp
+++ b/tools/libclang/CIndex.cpp
@@ -193,8 +193,8 @@
   if (!Visitor.shouldVisitIncludedEntities()) {
     // If the begin/end of the range lie in the same FileID, do the optimization
     // where we skip preprocessed entities that do not come from the same FileID.
-    FID = SM.getFileID(R.getBegin());
-    if (FID != SM.getFileID(R.getEnd()))
+    FID = SM.getFileID(SM.getFileLoc(R.getBegin()));
+    if (FID != SM.getFileID(SM.getFileLoc(R.getEnd())))
       FID = FileID();
   }