regcomp.c: Silence compiler warning msg.

Some compilers aren't smart enough to realize there is no path through
this function that doesn't set the return value.  So initialize to an
illegal value.

Spotted by atoomic

diff --git a/regcomp.c b/regcomp.c
index 5bae668..5cb8c6a 100644 (file)
--- a/regcomp.c
+++ b/regcomp.c
@@ -16478,7 +16478,7 @@ S_regclass(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth,
     UV prevvalue = OOB_UNICODE, save_prevvalue = OOB_UNICODE;
     IV range = 0;
     UV value = OOB_UNICODE, save_value = OOB_UNICODE;
-    regnode_offset ret;
+    regnode_offset ret = -1;    /* Initialized to an illegal value */
     STRLEN numlen;
     int namedclass = OOB_NAMEDCLASS;
     char *rangebegin = NULL;