"Apex Polymerization" fix

Shouldn't be able to use any other monsters for the Fusion Summon apart from the targeted monster and the Special Summoned monster.

Author: pyrQ

pre-release/c101304069.lua

@@ -66,6 +66,6 @@ function s.fextra(tc,sc)
 end
 function s.fcheck(tc,sc)
 	return  function(tp,sg,fc)
-				return sg:IsContains(tc) and sg:IsContains(sc)
+				return #sg==2 and sg:IsContains(tc) and sg:IsContains(sc)
 			end
-end
+end