fix restart if alive cell count is flapping

src/gameoflife.cpp

@@ -9,10 +9,9 @@ int arrayCopy[SCREEN_HEIGHT][SCREEN_WIDTH];
 
 bool runGame = true;
 
-int currentTick = 0;
-int cellsAliveBefore = 0;
-int cellsAliveNow = 0;
-int noEvolutionTicks = 0;
+int currentTick;
+int cellsAliveBefore;
+int noEvolutionTicks;
 
 void setupGameOfLife()
 {
@@ -40,8 +39,8 @@ void createRandomMatrix(int (&a)[SCREEN_HEIGHT][SCREEN_WIDTH])
 void gameOfLife(int (&a)[SCREEN_HEIGHT][SCREEN_WIDTH])
 {
   currentTick++;
-  cellsAliveBefore = cellsAliveNow;
-  cellsAliveNow = 0;
+  int cellsAliveNow = 0;
+ 
   for (int i = 0; i < SCREEN_HEIGHT; i++)
   {
     for (int j = 0; j < SCREEN_WIDTH; j++)
@@ -83,6 +82,10 @@ void gameOfLife(int (&a)[SCREEN_HEIGHT][SCREEN_WIDTH])
     }
   }
   
+  if (currentTick % 2) {
+    cellsAliveBefore = cellsAliveNow;
+  }
+  
   if (cellsAliveNow == cellsAliveBefore)
   {
     noEvolutionTicks++;