Switch LineTableInfo to use FileID instead of int for file references,
from Tom Honermann!

llvm-svn: 158211
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index 3b59163..b762d1c 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -829,7 +829,7 @@
       Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID,
                                        FileKind, IncludeOffset));
     }
-    LineTable.AddEntry(FID, Entries);
+    LineTable.AddEntry(FileID::get(FID), Entries);
   }
 
   return false;