Adds variable to disallow gibbing of limbs, checked after the variable to disallow dismemberment.

The head can no longer be gibbed.  Severing the head via sharp weapons remains an option.

code/modules/organs/organ_external.dm

@@ -56,6 +56,7 @@
 	var/disfigured = 0                 // Scarred/burned beyond recognition.
 	var/cannot_amputate                // Impossible to amputate.
 	var/cannot_break                   // Impossible to fracture.
+	var/cannot_gib                     // Impossible to gib, distinct from amputation.
 	var/joint = "joint"                // Descriptive string used in dislocation.
 	var/amputation_point               // Descriptive string used in amputation.
 	var/dislocated = 0                 // If you target a joint, you can dislocate the limb, causing temporary damage to the organ.
@@ -727,12 +728,16 @@ Note that amputating the affected organ does in fact remove the infection from t
 					"<span class='moderate'><b>Your [src.name] goes flying off!</b></span>",\
 					"<span class='danger'>You hear a terrible sound of [gore_sound].</span>")
 		if(DROPLIMB_BURN)
+			if(cannot_gib)
+				return
 			var/gore = "[(status & ORGAN_ROBOT) ? "": " of burning flesh"]"
 			owner.visible_message(
 				"<span class='danger'>\The [owner]'s [src.name] flashes away into ashes!</span>",\
 				"<span class='moderate'><b>Your [src.name] flashes away into ashes!</b></span>",\
 				"<span class='danger'>You hear a crackling sound[gore].</span>")
 		if(DROPLIMB_BLUNT)
+			if(cannot_gib)
+				return
 			var/gore = "[(status & ORGAN_ROBOT) ? "": " in shower of gore"]"
 			var/gore_sound = "[(status & ORGAN_ROBOT) ? "rending sound of tortured metal" : "sickening splatter of gore"]"
 			owner.visible_message(

code/modules/organs/subtypes/standard.dm

@@ -145,6 +145,7 @@
 	joint = "jaw"
 	amputation_point = "neck"
 	gendered_icon = 1
+	cannot_gib = 1
 	encased = "skull"
 	var/can_intake_reagents = 1