Fix not all %transfiletriggerpostun triggers executing (RhBug:1514085)

upstream commit db1b99db2543b2c2526a2e116daeffa0498d5de4
--- ./lib/rpmtriggers.c.orig	2017-10-05 10:04:57.121602122 +0000
+++ ./lib/rpmtriggers.c	2017-12-05 12:04:35.448096904 +0000
@@ -106,7 +106,6 @@ void rpmtriggersPrepPostUnTransFileTrigs
     rpmfiles files;
     rpmds rpmdsTriggers;
     rpmds rpmdsTrigger;
-    int tix = 0;
 
     ii = rpmdbIndexIteratorInit(rpmtsGetRdb(ts), RPMDBI_TRANSFILETRIGGERNAME);
     mi = rpmdbNewIterator(rpmtsGetRdb(ts), RPMDBI_PACKAGES);
@@ -131,6 +130,7 @@ void rpmtriggersPrepPostUnTransFileTrigs
     if (rpmdbGetIteratorCount(mi)) {
 	/* Filter triggers and save only trans postun triggers into ts */
 	while ((trigH = rpmdbNextIterator(mi)) != NULL) {
+	    int tix = 0;
 	    rpmdsTriggers = rpmdsNew(trigH, RPMTAG_TRANSFILETRIGGERNAME, 0);
 	    while ((rpmdsTrigger = rpmdsFilterTi(rpmdsTriggers, tix))) {
 		if ((rpmdsNext(rpmdsTrigger) >= 0) &&