Fix for PR2750; don't check for an 'e' in the trash after the token.

Note that this isn't really a complete fix; I think there are other 
potential overrun situations.  I don't really know what the best 
systematic fix is, though.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@55622 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/LiteralSupport.cpp b/lib/Lex/LiteralSupport.cpp
index f9fd1aa..8c2f2af 100644
--- a/lib/Lex/LiteralSupport.cpp
+++ b/lib/Lex/LiteralSupport.cpp
@@ -224,7 +224,7 @@
       saw_period = true;
       s = SkipDigits(s);
     } 
-    if (*s == 'e' || *s == 'E') { // exponent
+    if (s != ThisTokEnd && (*s == 'e' || *s == 'E')) { // exponent
       const char *Exponent = s;
       s++;
       saw_exponent = true;