Fix Sundry Runtime Errors XII (#7007)

* Fix Runtime in atoms_movable.dm,597: list index out of bounds

* Fix Runtime in floor_attackby.dm,118: Cannot execute 0.is crowbar().

* Fix null values being present in mob_list.

* Another fix for Runtime in update_icons.dm,254: Cannot execute null.GetUIState().

- This time lets just ensure dna is instantiated no matter who is calling dress_preview_mob().

* Fix Runtime in suit_storage_unit.dm,792: Cannot execute null.set machine().

- Also fixed other mixups of usr vs. user that I found in the same file.

* Fixes Runtime in find_spawning.dm,688: Cannot read null.origin_tech

- if this else if block is reached, new_item must not exist, so we obviously can't set origin_tech on it. Examination of the code seems to suggest the original author intended that for any "talking" items to have arcane and precursor tech; since src is now being made talking, src should get the tech.

* Fix talking artifacts downgrading arcane/precursor tech

- Bump up the values by one for talking artifact items instead of overwriting whatever the value was.

code/modules/mob/new_player/new_player.dm

@@ -19,6 +19,7 @@
 
 /mob/new_player/New()
 	mob_list += src
+	initialized = TRUE // Explicitly don't use Initialize().  New players join super early and use New()
 
 /mob/new_player/verb/new_player_panel()
 	set src = usr

code/modules/mob/new_player/preferences_setup.dm

@@ -194,6 +194,8 @@
 	b_skin = blue
 
 /datum/preferences/proc/dress_preview_mob(var/mob/living/carbon/human/mannequin)
+	if(!mannequin.dna) // Special handling for preview icons before SSAtoms has initailized.
+		mannequin.dna = new /datum/dna(null)
 	copy_to(mannequin, TRUE)
 
 	if(!equip_preview_mob)

code/modules/xenoarcheaology/finds/find_spawning.dm

@@ -674,8 +674,9 @@
 
 		if(talkative)
 			new_item.talking_atom = new(new_item)
-			LAZYSET(new_item.origin_tech, TECH_ARCANE, 1)
-			LAZYSET(new_item.origin_tech, TECH_PRECURSOR, 1)
+			LAZYINITLIST(new_item.origin_tech)
+			new_item.origin_tech[TECH_ARCANE] += 1
+			new_item.origin_tech[TECH_PRECURSOR] += 1
 
 		var/turf/simulated/mineral/T = get_turf(new_item)
 		if(istype(T))
@@ -685,5 +686,6 @@
 
 	else if(talkative)
 		src.talking_atom = new(src)
-		LAZYSET(new_item.origin_tech, TECH_ARCANE, 1)
-		LAZYSET(new_item.origin_tech, TECH_PRECURSOR, 1)
+		LAZYINITLIST(origin_tech)
+		origin_tech[TECH_ARCANE] += 1
+		origin_tech[TECH_PRECURSOR] += 1