Fixed double jump behaviour - need to release the jump key

defs.h

@@ -680,6 +680,7 @@ typedef struct sprite_s {
 	int doublejump;	// have we collected a doublejump powerup?
 
 	int useddoublejump;	
+	int doublejumpready;	
 
 	// player cards
 	int numcards;

rc.c

@@ -978,10 +978,16 @@ void jump(sprite_t *s, int dir) {
 				s->dir = s->jumpdir;
 			}
 
-			// used up the doublejump
-			if ((s->doublejump) && (s->falling)) {
-				s->useddoublejump = B_TRUE;
-				puffin(-1, s->x, s->y, "nothing", 0); 
+			if (s->doublejump) {
+				if (s->falling) {
+					// we just used up the doublejump
+					s->useddoublejump = B_TRUE;
+					puffin(-1, s->x, s->y, "nothing", 0); 
+				} else {
+					// we're jumping off the ground
+					// need to let go of jump before double jumping
+					s->doublejumpready = B_FALSE;
+				}
 			}
 
 			// if on rollers, they add to your inertia 
@@ -1002,6 +1008,7 @@ void jump(sprite_t *s, int dir) {
 			} else {
 				s->jumpspeed = 5;
 			}
+
 		}
 		// stop climbing
 		s->climbing = B_FALSE;
@@ -6576,6 +6583,7 @@ void handleinput(void)  {
 			player->netbig = B_TRUE; // big net
 			player->speed = 2; // fast
 			player->netsticky = B_TRUE;
+			player->doublejump = B_TRUE;
 			sprintf(tempm, "Cheat!");
 			addoutlinetext(player->x,player->y - player->img->h/2, TEXTSIZE_POINTS, tempm,&white,&black,POINTSDELAY,TT_NORM);
 			toggletimer = 80;
@@ -6719,6 +6727,11 @@ void handleinput(void)  {
 			// Jump
 			if (keydown(SDLK_x)) {
 				trytojump(player);
+			} else if (player->jumping && player->doublejump) {
+				// have to let go of jump button to double jump
+				if (!player->doublejumpready) {
+					player->doublejumpready = B_TRUE;
+				}
 			} 
 			// Shoot
 			if (keydown(SDLK_z)) {
@@ -6763,7 +6776,7 @@ void trytojump(sprite_t *pl) {
 	} else { // not in water
 		// jump
 		if (!pl->jumping)  {
-			if (!pl->falling || (pl->doublejump && pl->falling && (pl->fallspeed == 0))) {
+			if (!pl->falling || (pl->doublejump && pl->falling && (pl->fallspeed == 0) && pl->doublejumpready)) {
 				if (isonground(pl) || isonladder(pl) || pl->doublejump ) {
 					/* dropping through a bridge */
 					if (keydown(SDLK_DOWN))  {

shared.c

@@ -586,6 +586,7 @@ void setdefaults(sprite_t *s) {
 	}
 
 	s->doublejump = B_FALSE;
+	s->doublejumpready = B_FALSE;