Temperature Reagent Fix #2 (#5695)

Fixes an issue caused by temperature reagents,

code/modules/reagents/Chemistry-Holder.dm

@@ -144,13 +144,13 @@
 			else
 				if(temperature <= 0)
 					temperature = R.default_temperature
-				R.set_temperature(temperature)
+				R.add_thermal_energy(temperature * R.specific_heat * amount)
 			if(!isnull(data)) // For all we know, it could be zero or empty string and meaningful
 				R.mix_data(data, amount)
 			update_holder(!safety)
 			return 1
 
-	var/datum/reagent/D = SSchemistry.chemical_reagents[id]
+	var/datum/reagent/D = SSchemistry.chemical_reagents[id] //New reagent
 	if(D)
 		var/datum/reagent/R = new D.type()
 		reagent_list += R
@@ -159,7 +159,7 @@
 		R.specific_heat = SSchemistry.check_specific_heat(R)
 		R.thermal_energy = 0
 		if(thermal_energy > 0 && old_amount > 0)
-			R.add_thermal_energy(thermal_energy * (amount/old_amount) )
+			R.set_thermal_energy(thermal_energy * (amount/old_amount) )
 		else
 			if(temperature <= 0)
 				temperature = R.default_temperature

html/changelogs/burgerbb-changelog.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
+#   balance
+#################################
+
+# Your name.  
+author: BurgerBB
+
+# 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: "Fixes tempreature reagent issues caused by a previous fix."