lara_cheat: adjust fly cheat gun reset

This allows the gun undrawing animation to complete fully, avoiding
mesh issues if the cheat is exited very quickly.

Part of #237.

src/game/lara/lara_cheat.c

@@ -187,10 +187,9 @@ bool __cdecl Lara_Cheat_ExitFlyMode(void)
         g_Lara.gun_status = LGS_UNDRAW;
     } else {
         g_Lara.gun_status = LGS_ARMLESS;
+        Lara_Cheat_ReinitialiseGunMeshes();
     }
 
-    Lara_Cheat_ReinitialiseGunMeshes();
-
     Console_Log(GS(OSD_FLY_MODE_OFF));
     return true;
 }