makes it so tiles dont get deleted when walked over

this adds a critical bug of where if you somehow walk outside the map
the game will segfault

src/main.c

@@ -35,20 +35,23 @@ int main( int argc, char *argv[] ) { //yoinked from the internet argc is number
     int delay = 1000;
     int dosspin = 0;
     
- 
+    //TODO nuke bools they arnt part of the c99 standard
+    //here it js being stolen from curses 
     bool gamerun = true;
 
     struct entity {
         int x;
         int y;
-        int xold;
+        int xold; //i kinda dont like tbid xold yold shit
         int yold;
+        char under_char; //the char that is under the entity so when it moves off of it it wont be erased
+        char under_charold;
     }
 
-    player = {0, 0, 0, 0},
+    player = {0, 0, 0, 0, ' ', ' '},
-    enemy = {24, 16, 0, 0},
+    enemy = {24, 16, 0, 0, ' ', ' '},
-    debugent_x = {0, 0, 0, 0},
+    debugent_x = {0, 0, 0, 0, ' ', ' '},
-    debugent_y = {0, 0, 0, 0};
+    debugent_y = {0, 0, 0, 0, ' ', ' '};
 
     zom_scrinit();
 
@@ -64,6 +67,7 @@ int main( int argc, char *argv[] ) { //yoinked from the internet argc is number
           if ((currenttime % 5000)==0) {
             player.xold = player.x;
             player.yold = player.y;
+            player.under_charold = player.under_char;
             enemy.xold = enemy.x;
             enemy.yold = enemy.y;
             debugent_x.xold = debugent_x.x;
@@ -75,24 +79,28 @@ int main( int argc, char *argv[] ) { //yoinked from the internet argc is number
                 case 'a':
                     if (attempt_move(player.x, player.y, 1, 2) == 1) {
                         player.x--;
+                        player.under_char = readmap(player.x, player.y);
                     }
                     break;
 
                 case 'w':
                     if (attempt_move(player.x, player.y, 1, 1) == 1) {
                         player.y--;
+                        player.under_char = readmap(player.x, player.y);
                     }
                     break;
 
                 case 'd':
                     if (attempt_move(player.x, player.y, 1, 0) == 1) {
                         player.x++;
+                        player.under_char = readmap(player.x, player.y);
                     }
                     break;
 
                 case 's':
                     if (attempt_move(player.x, player.y, 1, 3) == 1) {
                         player.y++;
+                        player.under_char = readmap(player.x, player.y);
                     }
                     break;
 
@@ -170,7 +178,7 @@ int main( int argc, char *argv[] ) { //yoinked from the internet argc is number
                 break;
             }
 
-        zom_putcharat(player.xold, player.yold, ' ');
+        zom_putcharat(player.xold, player.yold, player.under_charold);
         zom_putcharat(player.x, player.y, '#');
         zom_putcharat(debugent_x.xold, debugent_x.yold, ' ');
         zom_putcharat(debugent_x.x, debugent_x.y, 'X');