checked for warnings here - not sure whether it was me or gcc that
didn't notice anythign wrong. g++ certainly did.
p4raw-id: //depot/perl@34678
START_EXTERN_C
-extern REGEXP* my_re_compile (pTHX_ const SV * const pattern, const U32 pm_flags);
+extern REGEXP* my_re_compile (pTHX_ SV * const pattern, const U32 pm_flags);
extern I32 my_regexec (pTHX_ REGEXP * const prog, char* stringarg, char* strend,
char* strbeg, I32 minend, SV* screamer,
void* data, U32 flags);