gui: Reset command buf offset on errors.

On read errors or EOF we close the pipe that corresponds to
stdout/stderr of the current display command. However, we miss to
reset the offset value of the command buffer in this case. If this
offset was positive at the time the read error occurred, we skip the
first part of the output of the next command.

Fix this by always resetting the offset after closing the pipe.

diff --git a/gui.c b/gui.c
index 716e299b5c02402097cd7dcdfe7907965f8fd551..2a0174b8e92e7dfa9ff0c4fee7f8929b9cbb7b20 100644 (file)
--- a/gui.c
+++ b/gui.c
@@ -1054,6 +1054,7 @@ repeat:
                                close(command_fds[i]);
                                command_fds[i] = -1;
                                flags[i] = 0;
+                               cbo[i] = 0;
                                if (command_fds[!i] < 0) /* both fds closed */
                                        return 0;
                        }