Fixes stack creation logic and return value

code/game/objects/items/stacks/stack.dm

@@ -137,6 +137,7 @@
 		if (istype(O, /obj/item/stack))
 			var/obj/item/stack/S = O
 			S.amount = produced
+			S.add_to_stacks(user)
 
 		if (istype(O, /obj/item/weapon/storage)) //BubbleWrap - so newly formed boxes are empty
 			for (var/obj/item/I in O)
@@ -284,13 +285,13 @@
 		return
 	return max_amount
 
-/obj/item/stack/proc/add_to_stacks(mob/usr as mob)
-	for (var/obj/item/stack/item in usr.loc)
+/obj/item/stack/proc/add_to_stacks(mob/user as mob)
+	for (var/obj/item/stack/item in user.loc)
 		if (item==src)
 			continue
 		var/transfer = src.transfer_to(item)
 		if (transfer)
-			usr << "You add a new [item.singular_name] to the stack. It now contains [item.amount] [item.singular_name]\s."
+			user << "<span class='notice'>You add a new [item.singular_name] to the stack. It now contains [item.amount] [item.singular_name]\s.</span>"
 		if(!amount)
 			break
 

code/modules/materials/material_sheets.dm

@@ -64,9 +64,10 @@
 	var/obj/item/stack/material/M = S
 	if(!istype(M) || material.name != M.material.name)
 		return 0
-	..(S,tamount,1)
+	var/transfer = ..(S,tamount,1)
 	if(src) update_strings()
 	if(M) M.update_strings()
+	return transfer
 
 /obj/item/stack/material/attack_self(var/mob/user)
 	if(!material.build_windows(user, src))

code/modules/materials/materials.dm

@@ -128,8 +128,6 @@ var/list/name_to_material
 	var/obj/item/stack/S = new rod_product(get_turf(user))
 	S.add_fingerprint(user)
 	S.add_to_stacks(user)
-	if(!(user.l_hand && user.r_hand))
-		user.put_in_hands(S)
 
 /material/proc/build_wired_product(var/mob/user, var/obj/item/stack/used_stack, var/obj/item/stack/target_stack)
 	if(!wire_product)

html/changelogs/Hubblenaut-master.yml

@@ -0,0 +1,37 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes: 
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#################################
+
+# Your name.  
+author: Hubblenaut
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes: 
+  - bugfix: "Material stacks now properly merge upon creation."
+  - bugfix: "Messages for adding to existing stack appear again."