Fix the new ability to unregister virtual table modules so that it works

for the automatic PRAGMA virtual tables.

FossilOrigin-Name: 5d6f4dfeea75c7dcd8c511545accb9eb4b405a02db034332249ba54794e313d2

src/vtab.c

@@ -72,6 +72,7 @@ Module *sqlite3VtabCreateModule(
       sqlite3DbFree(db, pDel);
       pMod = 0;
     }else{
+      sqlite3VtabEponymousTableClear(db, pDel);
       sqlite3VtabModuleUnref(db, pDel);
     }
   }