no longer requiring at least one colon in a scene config element

This now allows for `player;` instead of requiring `player:;`

src/corelib/scene.c

@@ -177,7 +177,7 @@ int _validate_config(FILE* file) {
 		}
 	} while(c != ';');
 
-	return colon_count == 1;
+	return colon_count <= 1;
 }
 
 static