Fix stock regex_match_simple

Fix regex_match_simple.

Where regex_match_ex referred to in this file?
Update regex.inc
Merge pull request #156 from 9iky6/patch-11

Fix stock regex_match_simple
Revert "Done" text due to AMXX-Studio compatibility.
Merge pull request #157 from Chuvi-w/master

Revert "Done" text due to AMXX-Studio compatibility.