regcomp.c: Silence valgrind warning

This happens only in doing debug output.  Initialize these two debugging
variables

1 files changed, 5 insertions, 1 deletions

diff --git a/regcomp.c b/regcomp.c
index 6cc680b1da..b2439d903b 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -4664,7 +4664,11 @@ Perl_re_compile(pTHX_ SV * const pattern, U32 orig_pm_flags)
        * Clever compilers notice this and complain. --jhi */
     REGC((U8)REG_MAGIC, (char*)RExC_emit);
 #endif
-    DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
+    DEBUG_PARSE_r(
+	PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n");
+        RExC_lastnum=0;
+        RExC_lastparse=NULL;
+    );
     if (reg(pRExC_state, 0, &flags,1) == NULL) {
 	RExC_precomp = NULL;
 	return(NULL);