Merge pull request #96 from ErwinJanssen/windows-build

Windows build

diff --cc plugin/core/gvplugin_core.c
index 1710c4df060186bf8fe4f585367949a016f69ca2,8ffd619962fd8ca479aa2b3b523dcab1385b22e0..77c31b1accf73cae3e2ef298ea08e7857f1ab1fd
--- 1/plugin/core/gvplugin_core.c
--- 2/plugin/core/gvplugin_core.c
+++ b/plugin/core/gvplugin_core.c
@@@ -16,10 -16,11 +16,12 @@@
  extern gvplugin_installed_t gvdevice_dot_types[];
  extern gvplugin_installed_t gvdevice_fig_types[];
  extern gvplugin_installed_t gvdevice_map_types[];
 +extern gvplugin_installed_t gvdevice_mp_types[];
  extern gvplugin_installed_t gvdevice_ps_types[];
  extern gvplugin_installed_t gvdevice_svg_types[];
+ #if !defined(WIN32)
  extern gvplugin_installed_t gvdevice_json_types[];
+ #endif
  extern gvplugin_installed_t gvdevice_tk_types[];
  extern gvplugin_installed_t gvdevice_vml_types[];
  extern gvplugin_installed_t gvdevice_pic_types[];
@@@ -28,10 -29,11 +30,12 @@@ extern gvplugin_installed_t gvdevice_po
  extern gvplugin_installed_t gvrender_dot_types[];
  extern gvplugin_installed_t gvrender_fig_types[];
  extern gvplugin_installed_t gvrender_map_types[];
 +extern gvplugin_installed_t gvrender_mp_types[];
  extern gvplugin_installed_t gvrender_ps_types[];
  extern gvplugin_installed_t gvrender_svg_types[];
+ #if !defined(WIN32)
  extern gvplugin_installed_t gvrender_json_types[];
+ #endif
  extern gvplugin_installed_t gvrender_tk_types[];
  extern gvplugin_installed_t gvrender_vml_types[];
  extern gvplugin_installed_t gvrender_pic_types[];
@@@ -46,10 -48,11 +50,12 @@@ static gvplugin_api_t apis[] = 
      {API_device, gvdevice_dot_types},
      {API_device, gvdevice_fig_types},
      {API_device, gvdevice_map_types},
 +    {API_device, gvdevice_mp_types},
      {API_device, gvdevice_ps_types},
      {API_device, gvdevice_svg_types},
+ #if !defined(WIN32)
      {API_device, gvdevice_json_types},
+ #endif
      {API_device, gvdevice_tk_types},
      {API_device, gvdevice_vml_types},
      {API_device, gvdevice_pic_types},
@@@ -58,10 -61,11 +64,12 @@@
      {API_render, gvrender_dot_types},
      {API_render, gvrender_fig_types},
      {API_render, gvrender_map_types},
 +    {API_render, gvrender_mp_types},
      {API_render, gvrender_ps_types},
      {API_render, gvrender_svg_types},
+ #if !defined(WIN32)
      {API_render, gvrender_json_types},
+ #endif
      {API_render, gvrender_tk_types},
      {API_render, gvrender_vml_types},
      {API_render, gvrender_pic_types},