Fix ‘is multibyte’ test regex.c’s mutually_exclusive_p (bug#24020)

* src/regex.c (mutually_exclusive_p): Fix how whether character is
unibyte is tested when calling execute_charset function.  This bug has
been introduced by [6dc6b00: Fix ‘[[:cc:]]*literal’ regex failing to
match ‘literal’] which dropped a call to IS_REAL_ASCII (c) macro.
Reinstitute it.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/regex.c b/src/regex.c
index 297bf718848..1f2a1f086de 100644
--- a/src/regex.c
+++ b/src/regex.c
@@ -4767,7 +4767,7 @@ mutually_exclusive_p (struct re_pattern_buffer *bufp, const_re_char *p1,
         else if ((re_opcode_t) *p1 == charset
                  || (re_opcode_t) *p1 == charset_not)
           {
-            if (!execute_charset (&p1, c, c, !multibyte))
+            if (!execute_charset (&p1, c, c, !multibyte || IS_REAL_ASCII (c)))
               {
                 DEBUG_PRINT ("   No match => fast loop.\n");
                 return 1;