Fixing an oversite in my first fix.

source/i18n/rematch.cpp

 /*
 **************************************************************************
 *   Copyright (C) 2002-2010 International Business Machines Corporation  *
 *   and others. All rights reserved.                                     *
 **************************************************************************
 */
 //
 //  file:  rematch.cpp
 //
 //         Contains the implementation of class RegexMatcher,
@@ skipping 5610 matching lines @@
                                 if(foldLength >= 0) {
                                     if(foldLength <= UCASE_MAX_STRING_LENGTH) {   // !!!: Does not correctly handle chars that fold to 0-length strings
                                         foldOffset = 0;
                                         U16_NEXT_UNSAFE(foldChars, foldOffset, c);
                                     } else {
                                         c = foldLength;
                                         foldLength = foldOffset; // to avoid reading chars from the folding buffer
                                     }
                                 }
                             }
+                        } else {
+                          c_is_valid = FALSE;
                         }
                         
                         if (fp->fInputIdx <= fActiveLimit && c_is_valid) {
                             if (U_IS_BMP(c)) {
                                 success = (*patternChars == c);
                                 patternChars += 1;
                             } else if (patternChars+1 < patternEnd) {
                                 success = (*patternChars == U16_LEAD(c) && *(patternChars+1) == U16_TRAIL(c));
                                 patternChars += 2;
                             }
@@ skipping 429 matching lines @@
 
     return;
 }
 
 
 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RegexMatcher)
 
 U_NAMESPACE_END
 
 #endif  // !UCONFIG_NO_REGULAR_EXPRESSIONS