Destroyed canisters no longer produce light or process. (#9742)

code/game/machinery/atmoalter/canister.dm

@@ -139,6 +139,7 @@ update_flag
 
 	if (src.destroyed)
 		cut_overlays()
+		set_light(FALSE)
 		src.icon_state = text("[]-1", src.canister_color)
 		return
 
@@ -201,7 +202,7 @@ update_flag
 
 /obj/machinery/portable_atmospherics/canister/machinery_process()
 	if (destroyed)
-		return
+		return PROCESS_KILL
 
 	..()
 

html/changelogs/destroyed_canister_lights.yml

@@ -0,0 +1,41 @@
+################################
+# 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
+#   balance
+#   admin
+#   backend
+#   security
+#   refactor
+#################################
+
+# Your name.  
+author: mikomyazaki
+
+# 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: "Destroyed canisters no longer emit light."