[Patch, Fortran, committed] Minor libgfortran/ fixes

[Tobias Burnus]

Found using Coverity Scanner. The first is a bug, the other just 
silences a dead-code warning.

Committed as Rev. 196603 after build + regtest.
Tobias
2013-03-11  Tobias Burnus  <bur...@net-b.de>

	* io/transfer.c (read_block_direct): Correct condition.
	* intrinsics/execute_command_line.c (execute_command_line):
	Remove dead code for the HAVE_FORK case.

diff --git a/libgfortran/io/transfer.c b/libgfortran/io/transfer.c
index 515c34f..d97a325 100644
--- a/libgfortran/io/transfer.c
+++ b/libgfortran/io/transfer.c
@@ -641,7 +641,7 @@ read_block_direct (st_parameter_dt *dtp, void *buf, size_t nbytes)
 
       have_read_subrecord = sread (dtp->u.p.current_unit->s, 
 				   buf + have_read_record, to_read_subrecord);
-      if (unlikely (have_read_subrecord) < 0)
+      if (unlikely (have_read_subrecord < 0))
 	{
 	  generate_error (&dtp->common, LIBERROR_OS, NULL);
 	  return;
diff --git a/libgfortran/intrinsics/execute_command_line.c b/libgfortran/intrinsics/execute_command_line.c
index d0f812d..fa6ea9f 100644
--- a/libgfortran/intrinsics/execute_command_line.c
+++ b/libgfortran/intrinsics/execute_command_line.c
@@ -72,52 +72,54 @@ execute_command_line (const char *command, bool wait, int *exitstat,
 #if defined(HAVE_FORK)
   if (!wait)
     {
       /* Asynchronous execution.  */
       pid_t pid;
 
       set_cmdstat (cmdstat, EXEC_NOERROR);
 
       if ((pid = fork()) < 0)
 	set_cmdstat (cmdstat, EXEC_CHILDFAILED);
       else if (pid == 0)
 	{
 	  /* Child process.  */
 	  int res = system (cmd);
 	  _exit (WIFEXITED(res) ? WEXITSTATUS(res) : res);
 	}
     }
   else
 #endif
     {
       /* Synchronous execution.  */
       int res = system (cmd);
 
       if (res == -1)
 	set_cmdstat (cmdstat, EXEC_SYSTEMFAILED);
+#ifndef HAVE_FORK
       else if (!wait)
 	set_cmdstat (cmdstat, EXEC_SYNCHRONOUS);
+#endif
       else
 	set_cmdstat (cmdstat, EXEC_NOERROR);
 
       if (res != -1)
 	{
 #if defined(WEXITSTATUS) && defined(WIFEXITED)
 	  *exitstat = WIFEXITED(res) ? WEXITSTATUS(res) : res;
 #else
 	  *exitstat = res;
 #endif
 	}
     }
 
   /* Now copy back to the Fortran string if needed.  */
   if (cmdstat && *cmdstat > EXEC_NOERROR)
     {
       if (cmdmsg)
 	fstrcpy (cmdmsg, cmdmsg_len, cmdmsg_values[*cmdstat],
 		strlen (cmdmsg_values[*cmdstat]));
       else
 	runtime_error ("Failure in EXECUTE_COMMAND_LINE: %s",
 		       cmdmsg_values[*cmdstat]);
     }
 }