Merge pull request #9596 from Linzolle/abductor-update

Bring abductors up-to-date with /tg/.

code/__DEFINES/is_helpers.dm

@@ -118,6 +118,8 @@ GLOBAL_LIST_INIT(turfs_without_ground, typecacheof(list(
 
 #define ismouse(A) (istype(A, /mob/living/simple_animal/mouse))
 
+#define iscow(A) (istype(A, /mob/living/simple_animal/cow))
+
 #define isslime(A) (istype(A, /mob/living/simple_animal/slime))
 
 #define isdrone(A) (istype(A, /mob/living/simple_animal/drone))

code/__DEFINES/movespeed_modification.dm

@@ -57,6 +57,7 @@
 
 #define MOVESPEED_ID_PRONE_DRAGGING                     "PRONE_DRAG"
 #define MOVESPEED_ID_HUMAN_CARRYING                     "HUMAN_CARRY"
+#define MOVESPEED_ID_SHRINK_RAY							"SHRUNKEN_SPEED_MODIFIER"
 
 #define MOVESPEED_ID_TASED_STATUS						"TASED"