[Qemu-trivial] [PATCH] vl: fix build when configured with no graphic support

[Antony Pavlov]

The following error occurs when building no graphic output support:

  vl.c: In function ‘main’:
  vl.c:2829:19: error: variable ‘ds’ set but not used 
[-Werror=unused-but-set-variable]
       DisplayState *ds;
                     ^
  cc1: all warnings being treated as errors

To reproduce this issue, just run:

  $ ./configure \
      --disable-curses \
      --disable-sdl \
      --disable-cocoa \
      --disable-gtk \
      --disable-vnc \
      --enable-werror
  $ make vl.o

Signed-off-by: Antony Pavlov <address@hidden>
---
 vl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/vl.c b/vl.c
index b42ac67..8fbf25e 100644
--- a/vl.c
+++ b/vl.c
@@ -4269,6 +4269,7 @@ int main(int argc, char **argv, char **envp)
     /* init local displays */
     switch (display_type) {
     case DT_NOGRAPHIC:
+        (void)ds;
         break;
 #if defined(CONFIG_CURSES)
     case DT_CURSES:
-- 
1.8.4.rc3