Rename the operation that loads a preprocessed entity from a given offset to indicate that we're loading from an offset, not an index, lest one be confused. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125394 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/ASTUnit.cpp b/lib/Frontend/ASTUnit.cpp
index 1138cd7..00902e8 100644
--- a/lib/Frontend/ASTUnit.cpp
+++ b/lib/Frontend/ASTUnit.cpp
@@ -1368,7 +1368,8 @@
 
   for (unsigned I = 0, N = PreprocessedEntitiesInPreamble.size(); I != N; ++I) {
     if (PreprocessedEntity *PE
-          = External->ReadPreprocessedEntity(PreprocessedEntitiesInPreamble[I]))
+          = External->ReadPreprocessedEntityAtOffset(
+                                            PreprocessedEntitiesInPreamble[I]))
       PreprocessedEntities.push_back(PE);
   }