Fix incorrect testing for the end of the both strings in CStrInCStrNoCase. This could cause a read-out-of-bounds error if s2 is smaller than s1.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58009 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ADT/StringExtras.h

@@ -159,7 +159,7 @@ static inline const char* CStrInCStrNoCase(const char *s1, const char *s2) {
   
   const char *I1=s1, *I2=s2;
   
-  while (*I1 != '\0' || *I2 != '\0' )
+  while (*I1 != '\0' && *I2 != '\0' )
     if (tolower(*I1) != tolower(*I2)) { // No match.  Start over.
       ++s1; I1 = s1; I2 = s2;
     }