- fbx: fix "could not read property name" warn message.

code/FBXProperties.cpp

@@ -117,7 +117,7 @@ std::string PeekPropertyName(const Element& element)
 {
 	ai_assert(element.KeyToken().StringContents() == "P");
 	const TokenList& tok = element.Tokens();
-	if(tok.size() < 5) {
+	if(tok.size() < 4) {
 		return "";
 	}