Add collision detection for zombies

zombies.c

@@ -1,7 +1,7 @@
 #include <world.h>
 #include <getPos.h>
 #include <screen.h>
-
+#include <collisionDetection.h>
 void addZombie(){
 	if(getOpenPos()){
 		int attempts=0;
@@ -53,6 +53,14 @@ void moveZombies(){
 				getNextPos(allEntities[i].curYpos,allEntities[i].curXpos,allEntities[0].curYpos,allEntities[0].curXpos);
 				allEntities[i].nextYpos = nextPos.y;
 				allEntities[i].nextXpos = nextPos.x;
+				
+				struct Entity * hitEntity = (struct Entity *)collisionDetect(allEntities[i].nextYpos, allEntities[i].nextXpos);
+				if(hitEntity){
+					if(!strcmp(hitEntity->type,"zombie")){
+						allEntities[i].nextYpos = allEntities[i].curYpos;
+						allEntities[i].nextXpos = allEntities[i].curXpos;
+					}				
+				}				
 				if(allEntities[i].nextYpos < 1 || allEntities[i].nextYpos>viewportWinRows-2){
 						allEntities[i].nextYpos = allEntities[i].curYpos;
 				}