Fix digitigrade vars being set to null, made some comments as to type int over bool

code/game/dna/dna2_ch.dm

@@ -1,5 +1,5 @@
 /datum/dna
-	var/digitigrade = 0
+	var/digitigrade = 0 //0, Not FALSE, for future use as indicator for digitigrade types (0 = None, 1 = default, 2 = digitigrade birdfeet, ...ect)
 
 /datum/dna/Clone()
 	. = ..()

code/modules/client/preference_setup/general/03_body_ch.dm

@@ -8,7 +8,12 @@
 	if(character.species.digi_allowed)
 		character.digitigrade = pref.digitigrade
 	else
-		character.digitigrade = FALSE
+		character.digitigrade = 0
+
+	//sanity check
+	if(character.digitigrade == null)
+		character.digitigrade = 0
+		pref.digitigrade = 0
 
 /datum/category_item/player_setup_item/general/body/OnTopic(var/href,var/list/href_list, var/mob/user)
 	if(href_list["digitigrade"])
@@ -25,4 +30,8 @@
 
 /datum/category_item/player_setup_item/general/body/save_character(var/savefile/S)
 	. = ..()
-	S["digitigrade"]	<< pref.digitigrade //CHOMPEdit
+	S["digitigrade"]	<< pref.digitigrade //CHOMPEdit
+
+/datum/category_item/player_setup_item/general/body/sanitize_character(var/savefile/S)
+	. = ..()
+	pref.digitigrade	= sanitize_integer(pref.digitigrade, 0, 1, initial(pref.digitigrade))

code/modules/client/preferences_ch.dm

@@ -1,2 +1,2 @@
 /datum/preferences
-	var/digitigrade = 0
+	var/digitigrade = 0 // 0 = no digi, 1 = default, 2+ = digi styles... (Not used yet)

code/modules/mob/living/carbon/human/human_defines_ch.dm

@@ -2,5 +2,4 @@
 	var/gender_change_cooldown = 0 // A cooldown for gender and gender indentify changing procs to make it easy to avoid spam of gender change
 	var/loneliness_stage = 0
 	var/next_loneliness_time = 0
-	var/digitigrade = 0
-	
+	var/digitigrade = 0 // 0 = no digi, 1 = default, 2+ = digi styles... (Not used yet)