[COMMITTED] libgfortran Fix a few memory leaks

[Jerry DeLisle]

While investigating PR70855 I found a few minor issues.

Attached patch regression tested on x86-64-linux,

        M       libgfortran/ChangeLog
        M       libgfortran/io/transfer.c
Committed r241392

2016-10-20  Jerry DeLisle  <jvdeli...@gcc.gnu.org>

        * io/transfer.c (finalize_transfer): Free format data in child
        procedures. (st_read_done, st_write_done): Don't free format
        hash table.


diff --git a/libgfortran/io/transfer.c b/libgfortran/io/transfer.c
index 1f46ca64..0879ca7a 100644
--- a/libgfortran/io/transfer.c
+++ b/libgfortran/io/transfer.c
@@ -3783,7 +3783,14 @@ finalize_transfer (st_parameter_dt *dtp)
     }

   if (dtp->u.p.current_unit && (dtp->u.p.current_unit->child_dtio  > 0))
-    return;
+    {
+      if (cf & IOPARM_DT_HAS_FORMAT)
+        {
+         free (dtp->u.p.fmt);
+         free (dtp->format);
+       }
+      return;
+    }

   if ((dtp->common.flags & IOPARM_DT_HAS_SIZE) != 0)
     *dtp->size = dtp->u.p.current_unit->size_used;
@@ -3972,7 +3979,6 @@ st_read_done (st_parameter_dt *dtp)
         {
          free (dtp->u.p.current_unit->filename);
          dtp->u.p.current_unit->filename = NULL;
-         free_format_hash_table (dtp->u.p.current_unit);
          free (dtp->u.p.current_unit->s);
          dtp->u.p.current_unit->s = NULL;
          if (dtp->u.p.current_unit->ls)
@@ -4043,7 +4049,6 @@ st_write_done (st_parameter_dt *dtp)
        {
          free (dtp->u.p.current_unit->filename);
          dtp->u.p.current_unit->filename = NULL;
-         free_format_hash_table (dtp->u.p.current_unit);
          free (dtp->u.p.current_unit->s);
          dtp->u.p.current_unit->s = NULL;
          if (dtp->u.p.current_unit->ls)