Sync function prototype with its actual definition.

Use the same parameter names as in the definition.  Cosmetic fix only.

Tatsuro Yamada

Discussion: https://postgr.es/m/58E711AF.7070305@lab.ntt.co.jp

contrib/postgres_fdw/postgres_fdw.c

@@ -278,7 +278,7 @@ static void postgresGetForeignPaths(PlannerInfo *root,
 						RelOptInfo *baserel,
 						Oid foreigntableid);
 static ForeignScan *postgresGetForeignPlan(PlannerInfo *root,
-					   RelOptInfo *baserel,
+					   RelOptInfo *foreignrel,
 					   Oid foreigntableid,
 					   ForeignPath *best_path,
 					   List *tlist,