Commit 361179786d9c27381bac185337db9526593e2b47

Arthur Schreiber 2016-10-06T18:30:30

Fix the existence check for `regcomp_l`. `xlocale.h` only defines `regcomp_l` if `regex.h` was included as well. Also change the test cases to actually test `p_regcomp` works with a multibyte locale.