Double MAX_RENDER_COMMANDS

Following changes to the console code, it turned out that at very high
resolutions, the large number of glyphs rendered would cause render
commands to be dropped; avoid this by simply raising the maximum number
of render commands.

code/renderergl2/tr_local.h

@@ -2364,7 +2364,7 @@ RENDERER BACK END COMMAND QUEUE
 =============================================================
 */
 
-#define	MAX_RENDER_COMMANDS	0x40000
+#define	MAX_RENDER_COMMANDS	0x80000
 
 typedef struct {
 	byte	cmds[MAX_RENDER_COMMANDS];