avpops: initialize local variable to avoid warning on db ops function

(cherry picked from commit 98bb8c7e5166d2ff494daa9c488073d16dcfb405)
(cherry picked from commit a3022d5525265e9cf41a41dc9f0d01a8865a922c)

modules/avpops/avpops_impl.c

@@ -290,7 +290,7 @@ int ops_dbload_avps (struct sip_msg* msg, struct fis_param *sp,
 	str *s0, *s1, *s2;
 	int_str avp_name;
 	int avp_type = 0;
-	pv_value_t xvalue;
+	pv_value_t xvalue = {0};
 
 	s0 = s1 = s2 = NULL;
 	if (!((sp->opd&AVPOPS_VAL_PVAR)||(sp->opd&AVPOPS_VAL_STR))) {