Bail out early when building an ast_trans_pvt and the translator doesn't supply a 'newpvt'

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@378248 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/translate.c

@@ -283,6 +283,12 @@ static void *newpvt(struct ast_translator *t, const struct ast_format *explicit_
 	int len;
 	char *ofs;
 
+	/* If we don't have a local init routine, don't bother building the
+	   ast_trans_pvt  */
+	if (!t->newpvt) {
+		return NULL;
+	}
+
 	/*
 	 * compute the required size adding private descriptor,
 	 * buffer, AST_FRIENDLY_OFFSET.
@@ -309,7 +315,7 @@ static void *newpvt(struct ast_translator *t, const struct ast_format *explicit_
 		ast_format_copy(&pvt->explicit_dst, explicit_dst);
 	}
 	/* call local init routine, if present */
-	if (t->newpvt && t->newpvt(pvt)) {
+	if (t->newpvt(pvt)) {
 		ast_free(pvt);
 		return NULL;
 	}