Do not bail out if only GDI+ is found.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@3622 92316355-f0b4-4df1-b90c-862c8a59935f

configure.ac

@@ -188,7 +188,7 @@ if test "${ac_cv_my_have_jpeg}" != "no"; then
 fi
 AM_CONDITIONAL(USE_JPEG, test "${ac_cv_my_have_jpeg}" = "yes")
 
-if test "${ac_cv_my_have_sdl}" = "no" -a "${ac_cv_my_have_imlib2}" = "no" -a "${ac_cv_my_have_opencv}" = "no" -a "${ac_cv_my_have_cocoa}" = "no" -a "${ac_cv_my_have_jpeg}" = "no"; then
+if test "${ac_cv_my_have_sdl}" = "no" -a "${ac_cv_my_have_imlib2}" = "no" -a "${ac_cv_my_have_opencv}" = "no" -a "${ac_cv_my_have_cocoa}" = "no" -a "${ac_cv_my_have_jpeg}" = "no" -a "${ac_cv_my_have_gdiplus}" = "no"; then
   AC_MSG_ERROR([[cannot find GDI+, SDL_Image, Imlib2, Cocoa or OpenCV, please install one of them]])
 fi