Cohesion turns into normal mode if the window becomes too small

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

pixelGameEngine.h

@@ -3357,11 +3357,13 @@ namespace olc
 			int bh = vScreenSize.y*vPixelSize.y/baseFactor;
 
 			int32_t xmult = vWindowSize.x / bw;
+			if (xmult==0) goto nonPixelCohesion; 
 			vViewSize.x = (vWindowSize.x / bw) * bw;
 			vViewSize.y = bh*xmult;
 			vScreenPixelSize = vPixelSize*xmult/baseFactor;
 			if (vWindowSize.x / bw > vWindowSize.y / bh) {
 				int32_t ymult = vWindowSize.y / bh;
+				if (ymult==0) goto nonPixelCohesion;
 				vViewSize.y = (vWindowSize.y / bh) * bh;
 				vViewSize.x = bw*ymult;
 				vScreenPixelSize = vPixelSize*ymult/baseFactor;
@@ -3369,6 +3371,7 @@ namespace olc
 		}
 		else
 		{
+			nonPixelCohesion:
 			vViewSize.x = (int32_t)vWindowSize.x;
 			vViewSize.y = (int32_t)((float)vViewSize.x / wasp);