Fix emacsclient bug where "-n -c" does not open a new frame on Windows.

* lib-src/emacsclient.c (decode_options) [WINDOWSNT]: Don't force tty = 0;
instead, treat both -c and -t as always requesting a new "tty" frame,
and let server.el decide which kind is actually required.
Reported by Uwe Siart <usenet@siart.de> in this thread:
http://lists.gnu.org/archive/html/emacs-devel/2011-11/msg00303.html

* lisp/server.el (server-delete-client): On Windows, do not try to delete
the only terminal.
(server-process-filter): On Windows, treat requests for a tty frame as
if they were for a GUI frame if the running server is in GUI mode.

2 files changed, 19 insertions, 6 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index c77ace6d483..3d09a225da0 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,10 @@
+2011-12-04  Juanma Barranquero  <lekktu@gmail.com>
+
+        * server.el (server-delete-client): On Windows, do not try to delete
+        the only terminal.
+        (server-process-filter): On Windows, treat requests for a tty frame as
+        if they were for a GUI frame if the running server is in GUI mode.
+
 2011-12-03  Glenn Morris  <rgm@gnu.org>
 
         * textmodes/texinfmt.el (batch-texinfo-format): Doc fix.  (Bug#10207)
diff --git a/lisp/server.el b/lisp/server.el
index e02f63a8268..edd8f2afa93 100644
--- a/lisp/server.el
+++ b/lisp/server.el
@@ -307,11 +307,13 @@ Updates `server-clients'."
 
       (setq server-clients (delq proc server-clients))
 
-      ;; Delete the client's tty.
-      (let ((terminal (process-get proc 'terminal)))
-        ;; Only delete the terminal if it is non-nil.
-        (when (and terminal (eq (terminal-live-p terminal) t))
-          (delete-terminal terminal)))
+      ;; Delete the client's tty, except on Windows (both GUI and console),
+      ;; where there's only one terminal and does not make sense to delete it.
+      (unless (eq system-type 'windows-nt)
+        (let ((terminal (process-get proc 'terminal)))
+          ;; Only delete the terminal if it is non-nil.
+          (when (and terminal (eq (terminal-live-p terminal) t))
+            (delete-terminal terminal))))
 
       ;; Delete the client's process.
       (if (eq (process-status proc) 'open)
@@ -1035,7 +1037,11 @@ The following commands are accepted by the client:
                  (setq tty-name (pop args-left)
                        tty-type (pop args-left)
                        dontkill (or dontkill
-                                    (not use-current-frame))))
+                                    (not use-current-frame)))
+                 ;; On Windows, emacsclient always asks for a tty frame.
+                 ;; If running a GUI server, force the frame type to GUI.
+                 (when (eq window-system 'w32)
+                   (push "-window-system" args-left)))
 
                 ;; -position LINE[:COLUMN]:  Set point to the given
                 ;;  position in the next file.