Allow K_MomentumToFacing to work when you just hit the floor

(also prevent a crash when Ballhog balls die)

src/dehacked.c

@@ -6415,6 +6415,7 @@ static const char *const STATE_LIST[] = { // array length left dynamic for sanit
 	"S_BALLHOG6",
 	"S_BALLHOG7",
 	"S_BALLHOG8",
+	"S_BALLHOG_DEAD",
 
 	// Self-Propelled Bomb - just an explosion for now...
 	"S_BLUELIGHTNING1",

src/info.c

@@ -2735,6 +2735,7 @@ state_t states[NUMSTATES] =
 	{SPR_BHOG,               5, 2, {NULL}, 0, 0, S_BALLHOG7}, // S_BALLHOG6
 	{SPR_BHOG,               6, 1, {NULL}, 0, 0, S_BALLHOG8}, // S_BALLHOG7
 	{SPR_BHOG,               7, 1, {NULL}, 0, 0, S_BALLHOG1}, // S_BALLHOG8
+	{SPR_NULL, 0, 1, {NULL}, 0, 0, S_NULL},	// S_BALLHOG_DEAD
 
 	{SPR_BLIG, 0,  2, {NULL}, 0, 0, S_BLUELIGHTNING2},             // S_BLUELIGHTNING1
 	{SPR_BLIG, 1,  2, {NULL}, 0, 0, S_BLUELIGHTNING3},             // S_BLUELIGHTNING2
@@ -14907,7 +14908,7 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 		sfx_None,       // painsound
 		S_NULL,         // meleestate
 		S_NULL,         // missilestate
-		S_NULL,         // deathstate
+		S_BALLHOG_DEAD, // deathstate
 		S_NULL,         // xdeathstate
 		sfx_mario1,     // deathsound
 		0,              // speed

src/info.h

@@ -3253,6 +3253,7 @@ typedef enum state
 	S_BALLHOG6,
 	S_BALLHOG7,
 	S_BALLHOG8,
+	S_BALLHOG_DEAD,
 
 	// Self-Propelled Bomb - just an explosion for now...
 	S_BLUELIGHTNING1,

src/k_kart.c

@@ -1300,7 +1300,8 @@ void K_MomentumToFacing(player_t *player)
 		dangle = InvAngle(dangle);
 
 	// If you aren't on the ground or are moving in too different of a direction don't do this
-	if (!P_IsObjectOnGround(player->mo) || dangle > ANGLE_90)
+	if ((!P_IsObjectOnGround(player->mo))
+		|| (dangle > ANGLE_90 && !(player->mo->eflags & MFE_JUSTHITFLOOR)))
 		return;
 
 	P_Thrust(player->mo, player->mo->angle, player->speed - FixedMul(player->speed, player->mo->friction));