Add menu option to create blank disc image.

src/wx-sdl2.c

@@ -42,6 +42,8 @@
 #include "wx-common.h"
 #include "wx-display.h"
 
+extern void creatediscimage_open(void *hwnd);
+
 #define ID_IS(s) wParam == wx_xrcid(s)
 #define ID_RANGE(a, b) wParam >= wx_xrcid(a) && wParam <= wx_xrcid(b)
 
@@ -856,6 +858,10 @@ int wx_handle_command(void* hwnd, int wParam, int checked)
                 wx_checkmenuitem(hmenu, wParam, bpb_disable);
                 saveconfig(NULL);
         }
+        else if (ID_IS("IDM_DISC_CREATE"))
+        {
+                creatediscimage_open(hwnd);
+        }
         else if (ID_IS("IDM_DISC_ZIP"))
         {
                 char zip_fn[256] = "";