Fix #76574: use of undeclared identifiers INT_MAX and LONG_MAX

As of Oniguruma 6.4.0 <limits.h> is required, so we have to add a check
for this header file to set the respective macro.

Author: cmb69

NEWS

@@ -20,6 +20,7 @@ PHP                                                                        NEWS
     log_limit, log_buffering and decorate_workers_output. (Jakub Zelenka) 
 
 - mbstring:
+  . Fixed bug #76574 (use of undeclared identifiers INT_MAX and LONG_MAX). (cmb)
   . Fixed bug #76594 (Bus Error due to unaligned access in zend_ini.c
     OnUpdateLong). (cmb, Nikita)
 

ext/mbstring/config.m4

@@ -96,7 +96,7 @@ int main() { return foo(10, "", 3.14); }
         ])
       ])
 
-      AC_CHECK_HEADERS([stdlib.h string.h strings.h unistd.h sys/time.h sys/times.h stdarg.h])
+      AC_CHECK_HEADERS([stdlib.h string.h strings.h unistd.h sys/time.h sys/times.h stdarg.h limits.h])
       AC_CHECK_SIZEOF(int, 4)
       AC_CHECK_SIZEOF(short, 2)
       AC_CHECK_SIZEOF(long, 4)