Fixes a server crashing bug with reagents. (#18590)

Co-authored-by: Matt Atlas <liermattia@gmail.com>

code/modules/reagents/Chemistry-Holder.dm

@@ -55,7 +55,7 @@
 			if(!primary_reagent || reagent_volumes[primary_reagent] < vol)
 				primary_reagent = R
 	if(total_volume > maximum_volume)
-		remove_any(maximum_volume - total_volume)
+		remove_any(total_volume - maximum_volume)
 	return max(total_volume,0)
 
 /datum/reagents/proc/update_holder(var/reactions = TRUE)

html/changelogs/mattatlas-sousou.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: MattAtlas
+
+# 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: "Fixed a server crashing bug with reagent transfer going into the negatives if a container ended up with more reagents than its total amount allowed."