Apply a fix to the determineDirection function that makes it conform to the rule specification

common/src/algorithms/movementDirection.ts

@@ -40,8 +40,27 @@ export function countShips(board: any[], shipLocation: number) {
  * - `1` = Towards the Warp Gate
  */
 export function determineDirection(board: any[], shipLocation: number) {
-	let delta = 1;
 
+	/*
+	Edge-Case check for when the board only has a single ship on it because any
+	ships that hit the warp gate get removed from the game, and ships in the
+	singularity don't create gravity wells, not affecting other ships.
+	*/
+	let shipCount = 0;
+	for (const location of board) {
+		if (location != null) {
+			shipCount++;
+			if (shipCount >= 2) {
+				break;
+			};
+		};
+	};
+	if (shipCount == 1) {
+		return 1;
+	};
+
+
+	let delta = 1;
 	while (true) {
 		// The left side of the board is out of range, nearest ship is always
 		// right