TTAnt must be reimplemented for Bulgarian after we changed the tenses

src/bulgarian/CatBul.gf

@@ -1,5 +1,5 @@
 --# -coding=utf8
-concrete CatBul of Cat = CommonX - [Temp,Tense,IAdv,AdV] ** open ResBul, Prelude, Predef, (R = ParamX) in {
+concrete CatBul of Cat = CommonX - [Temp,Tense,TTAnt,IAdv,AdV] ** open ResBul, Prelude, Predef, (R = ParamX) in {
 
   lincat
 -- Tensed/Untensed

src/bulgarian/TenseBul.gf

@@ -1,6 +1,7 @@
-concrete TenseBul of Tense = CatBul [Tense,Temp], TenseX - [Temp,Tense,TPres,TPast,TFut,TCond,IAdv,AdV,SC] ** open ResBul in {
+concrete TenseBul of Tense = CatBul [Tense,Temp], TenseX - [Temp,Tense,TTAnt,TPres,TPast,TFut,TCond,IAdv,AdV,SC] ** open ResBul in {
 
 lin
+  TTAnt t a = {s = a.s ++ t.s ; a = a.a ; t = t.t} ;
   TPres = {s = []} ** {t = VPresent} ;
   TPast = {s = []} ** {t = VPastImperfect} ;  --# notpresent
   TFut  = {s = []} ** {t = VFut} ;            --# notpresent