Fixed #804.

Phoenix won't upgrade to Centaur Captain ;)

Minor tweaks.

config/battles_graphics.json

@@ -103,7 +103,7 @@
 		{ "id": 49, "defnames": [ "C11SPA1.DEF" ] },
 		{ "id": 50, "defnames": [ "C12SPE0.DEF" ] },
 		{ "id": 51, "defnames": [ "C12SPF0.DEF" ] },
-		{ "id": 52, "defnames": [ "C12SPE0.DEF" ] },
+		{ "id": 52, "defnames": [ "SP06_.DEF" ] },
 		{ "id": 53, "defnames": [ "C13SPF.DEF", "C13SPF0.DEF" ] },
 		{ "id": 54, "defnames": [ "C16SPE.DEF", "C16SPE0.DEF" ] },
 		{ "id": 55, "defnames": [ "C17SPE0.DEF" ] },

config/creatures.json

@@ -1341,7 +1341,6 @@
 				"faction": 8,
 				"ability_add": [ [ "CASTS", 1, 0, 0 ],	//Phoenix rebirths once
 							   	 [ "REBIRTH", 20, 0, 0 ] ],	//20% of stack is resurrected
-				"upgrade": 15,
 				"defname": "CPHX.DEF"
 			},