Fix #78338: Array cross-border reading in PCRE

We backport r1092 from pcre2.

Author: cmb69

ext/pcre/pcre2lib/pcre2_jit_compile.c

@@ -7288,7 +7288,7 @@ int lgb, rgb, ricount;
 PCRE2_SPTR bptr;
 uint32_t c;
 
-GETCHARINC(c, cc);
+c = *cc++;
 lgb = UCD_GRAPHBREAK(c);
 
 while (cc < end_subject)

ext/pcre/tests/bug78338.phpt

@@ -0,0 +1,10 @@
+--TEST--
+Bug #78338 (Array cross-border reading in PCRE)
+--FILE--
+<?php
+$string = hex2bin('2f5c583f3d3f223f3536ff3636ffffffff36a8a8a83636367a7a7a7a3d2aff2f0a');
+preg_match($string, $string);
+echo "DONE\n";
+?>
+--EXPECT--
+DONE