Silence 'may be used uninitialized' warnings.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@138475 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/TokenLexer.cpp b/lib/Lex/TokenLexer.cpp
index 80f6ad1..a651f6c 100644
--- a/lib/Lex/TokenLexer.cpp
+++ b/lib/Lex/TokenLexer.cpp
@@ -698,7 +698,7 @@
   // For the consecutive tokens, find the length of the SLocEntry to contain
   // all of them.
   Token &LastConsecutiveTok = *(NextTok-1);
-  int LastRelOffs;
+  int LastRelOffs = 0;
   SM.isInSameSLocAddrSpace(FirstLoc, LastConsecutiveTok.getLocation(),
                            &LastRelOffs);
   unsigned FullLength = LastRelOffs + LastConsecutiveTok.getLength();
@@ -711,7 +711,7 @@
   // expanded location.
   for (; begin_tokens < NextTok; ++begin_tokens) {
     Token &Tok = *begin_tokens;
-    int RelOffs;
+    int RelOffs = 0;
     SM.isInSameSLocAddrSpace(FirstLoc, Tok.getLocation(), &RelOffs);
     Tok.setLocation(Expansion.getFileLocWithOffset(RelOffs));
   }