PR 53796 Make inquire(file=, recl=) conform to F2018

In my original patch to fix PR 53796 I forgot to fix the behavior for
unconnected units when inquiring via filename. This patch fixes that.

Regtested on x86_64-pc-linux-gnu, committed as obvious.

libgfortran/ChangeLog:

2019-08-07  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/53796
	* io/inquire.c (inquire_via_filename): Set recl to -1 for
	unconnected units.

gcc/testsuite/ChangeLog:

2019-08-07  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/53796
	* gfortran.dg/inquire_recl_f2018.f90: Test for unconnected unit
	with inquire via filename.

From-SVN: r274160

gcc/testsuite/ChangeLog

+2019-08-07  Janne Blomqvist  <jb@gcc.gnu.org>
+
+	PR fortran/53796
+	* gfortran.dg/inquire_recl_f2018.f90: Test for unconnected unit
+	with inquire via filename.
+
 2019-08-07  Jakub Jelinek  <jakub@redhat.com>
 
 	* c-c++-common/gomp/target-data-1.c (foo): Use use_device_addr clause

gcc/testsuite/gfortran.dg/inquire_recl_f2018.f90

@@ -39,4 +39,11 @@ program inqrecl
   if (r /= -2) then
      STOP 5
   end if
+
+  ! Also inquire by filename for a non-opened unit is considered
+  ! unconnected similar to the first test.
+  inquire(file='unconnectedfile.txt', recl=r)
+  if (r /= -1) then
+     stop 6
+  end if
 end program inqrecl

libgfortran/ChangeLog

+2019-08-07  Janne Blomqvist  <jb@gcc.gnu.org>
+
+	PR fortran/53796
+	* io/inquire.c (inquire_via_filename): Set recl to -1 for
+	unconnected units.
+
 2019-07-21  Thomas König  <tkoenig@gcc.gnu.org>
 
 	PR libfortran/91030

libgfortran/io/inquire.c

@@ -706,7 +706,9 @@ inquire_via_filename (st_parameter_inquire *iqp)
     }
 
   if ((cf & IOPARM_INQUIRE_HAS_RECL_OUT) != 0)
-    *iqp->recl_out = 0;
+    /* F2018 (N2137) 12.10.2.26: If there is no connection, recl is
+       assigned the value -1.  */
+    *iqp->recl_out = -1;
 
   if ((cf & IOPARM_INQUIRE_HAS_NEXTREC) != 0)
     *iqp->nextrec = 0;