Fixed Unstable Mutagen chance (#343)

* Fixed Unstable Mutagen chance

This fixes the mutation chance of unstable mutagen, to behave as the
author intended.

It also adds a little RP message to give some feedback

Nanako-PR-343.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: Nanako
+
+# 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 the mutation chance on unstable mutagen. It was 1% of what it should have been"
+  - rscadd: "Added a little RP message when unstable mutagen does its thing"

code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Toxins.dm

@@ -235,7 +235,8 @@
 
 /datum/reagent/mutagen/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(M.dna)
-		if(prob(removed * 0.1)) // Approx. one mutation per 10 injected/20 ingested/30 touching units
+		if(prob(removed * 10)) // Approx. one mutation per 10 injected/20 ingested/30 touching units
+			M << "Something feels different about you..."
 			randmuti(M)
 			if(prob(98))
 				randmutb(M)