Game: make BOUNCEMINE spawn FRAMEEFFECT only if moving horizontally.

Also add "zshoot -4096 BOUNCEMINE" to lunatic/test/weaponvars.con
to demonstrate that bouncemines can be shot.

git-svn-id: https://svn.eduke32.com/eduke32@5319 1a8010ca-5511-0410-912e-c29ae57300e0

polymer/eduke32/source/actors.c

@@ -4498,10 +4498,13 @@ ACTOR_STATIC void G_MoveActors(void)
         }
 
         case BOUNCEMINE__STATIC:
+        if (s->xvel != 0)
         case MORTER__STATIC:
+        {
             j = A_Spawn(i,(PLUTOPAK?FRAMEEFFECT1:FRAMEEFFECT1_13));
             actor[j].t_data[0] = 3;
-
+        }
+            /* fall-through */
         case HEAVYHBOMB__STATIC:
         {
             int32_t p;

polymer/eduke32/source/lunatic/test/weaponvars.con

@@ -6,6 +6,8 @@ gamevar shoots 2605 2  // RPG
 gamevar WEAPON1_SHOOTS 2605 0
 
 define MORTER2 1653
+// NOTE: the custom MORTER2 doesn't spawn FRAMEEFFECT like the MORTER, which
+// has some hard-wired code running.
 defineprojectile MORTER2 PROJ_WORKSLIKE 6150
 defineprojectile MORTER2 PROJ_SPAWNS EXPLOSION2
 defineprojectile MORTER2 PROJ_SOUND RPG_SHOOT
@@ -32,6 +34,8 @@ definequote 400 Failed setting projectile userdata
 useractor notenemy 909  // tree trunk
     ifcount 120
     {
+        zshoot -4096 BOUNCEMINE
+
         // userdata: bitwise-OR in 64
         getprojectile[MORTER2].userdata tmp
         orvar tmp 64