debug Traversal method

src/main/java/MainExercises.java

@@ -78,6 +78,8 @@ public class MainExercises
         int rows = matrix.length;
         int cols = matrix[0].length;
 
+        if(rows == 1) return matrix[0];
+
         int[] result = new int[rows * cols];
 
         int top = 0, bottom = rows - 1, left = 0, right = cols - 1;