Little bit of maintenance:

* Return the Doom 2 Cast Call to vanilla and simply label Doomguy as Doomguy
 * Ensure there are TWO canvas textures available for the Plasma Blaster screen
 * Fix some typos in material shader definitions for Demo-chan's face (oops)

language.def_base

@@ -172,6 +172,8 @@ GOTYELWSKUL = "Yellow Skull Key";
 GOTREDSKUL = "Red Skull Key";
 // edited vanilla pickup messages
 TXT_DEFAULTPICKUPMSG = "Unidentified Item";
+// not our hero
+CC_HERO = "Doomguy";
 // quit messages
 QUITMSG = "You really want to go?\nWhat a shame...";
 QUITMSG1 = "Wow, don't just go and leave!\nThere's still a lot of stuff to do!";