Fix naming conflict with DOS32 port

Dos32/allegro.c

@@ -111,7 +111,7 @@ int history_index = 0;
 /* Display bitmap variables */
 BITMAP* display = NULL;
 PALETTE palette;
-int gfx_mode = GFX_AUTODETECT_FULLSCREEN;
+int allegro_gfx_mode = GFX_AUTODETECT_FULLSCREEN;
 int screen_width = 640;
 int screen_height = 480;
 int text_x = 0;
@@ -581,7 +581,7 @@ void prepare_screen(void)
 
   /* Set up the screen. */
   set_color_depth(8);
-  if (set_gfx_mode(gfx_mode,screen_width,screen_height,0,0) < 0)
+  if (set_gfx_mode(allegro_gfx_mode,screen_width,screen_height,0,0) < 0)
     fatal(allegro_error);
   clear(screen);
   set_default_palette();
@@ -1346,13 +1346,13 @@ int main(int argc, char** argv)
     /* Get the display mode, width and height. */
     if (display_type == 0)
     {
-      gfx_mode = GFX_AUTODETECT_WINDOWED;
+      allegro_gfx_mode = GFX_AUTODETECT_WINDOWED;
       screen_width = display_width;
       screen_height = display_height;
     }
     else
     {
-      gfx_mode = GFX_AUTODETECT_FULLSCREEN;
+      allegro_gfx_mode = GFX_AUTODETECT_FULLSCREEN;
       screen_width = display_modes[display_type].width;
       screen_height = display_modes[display_type].height;
     }
@@ -1404,7 +1404,7 @@ int main(int argc, char** argv)
 int get_file_name(const char* prompt, const char* filter, char* buffer, int save)
 {
 #ifdef _WIN32
-  if (gfx_mode == GFX_AUTODETECT_WINDOWED)
+  if (allegro_gfx_mode == GFX_AUTODETECT_WINDOWED)
   {
     OPENFILENAME open_file;
     BOOL got_file = FALSE;

level9.c

@@ -2997,7 +2997,7 @@ int scaley(int y)
 	return (gfx_mode == GFX_V2) ? 127 - (y>>7) : 95 - (((y>>5)+(y>>6))>>3);
 }
 
-void set_gfx_mode(void)
+void detect_gfx_mode(void)
 {
 	if (L9GameType == L9_V3)
 	{
@@ -3042,7 +3042,7 @@ void _screen(void)
 		return;
 	}
 
-	set_gfx_mode();
+	detect_gfx_mode();
 	l9textmode = *codeptr++;
 	if (l9textmode)
 	{
@@ -3501,7 +3501,7 @@ void show_picture(int pic)
 		   graphics, so here graphics are enabled if necessary. */
 		if ((screencalled == 0) && (l9textmode == 0))
 		{
-			set_gfx_mode();
+			detect_gfx_mode();
 			l9textmode = 1;
 			os_graphics(1);
 		}