Add IdentifierTable::get() overload and start using it

llvm-svn: 98343
diff --git a/clang/lib/Frontend/PCHReader.cpp b/clang/lib/Frontend/PCHReader.cpp
index 267f4c1..49eb2a0 100644
--- a/clang/lib/Frontend/PCHReader.cpp
+++ b/clang/lib/Frontend/PCHReader.cpp
@@ -2628,7 +2628,7 @@
     unsigned StrLen = (((unsigned) StrLenPtr[0])
                        | (((unsigned) StrLenPtr[1]) << 8)) - 1;
     IdentifiersLoaded[ID - 1]
-      = &PP->getIdentifierTable().get(Str, Str + StrLen);
+      = &PP->getIdentifierTable().get(Str, StrLen);
   }
 
   return IdentifiersLoaded[ID - 1];