human: move organ generation into a species proc

New proc: /datum/species/create_organs
Called in set_species when no organs exist or it's forced.
Also shuffled set_species around a bit, adding a var to human/new to
specify a species to start as.
Should fix the adminspawn vox organ runtime.

Signed-off-by: Mloc-Argent <colmohici@gmail.com>

code/modules/projectiles/projectile/change.dm

@@ -61,7 +61,7 @@
 					else			new_mob = new /mob/living/carbon/alien/larva(M.loc)
 				new_mob.universal_speak = 1
 			if("human")
-				new_mob = new /mob/living/carbon/human(M.loc)
+				new_mob = new /mob/living/carbon/human(M.loc, pick(all_species))
 				if(M.gender == MALE)
 					new_mob.gender = MALE
 					new_mob.name = pick(first_names_male)
@@ -73,10 +73,6 @@
 
 				var/datum/preferences/A = new()	//Randomize appearance for the human
 				A.randomize_appearance_for(new_mob)
-
-				var/mob/living/carbon/human/H = new_mob
-				var/newspecies = pick(all_species)
-				H.set_species(newspecies)
 			else
 				return