Rounds oxyloss from bloodloss (#4172)

# About the pull request

Rounds oxyloss from bloodloss

# Explain why it's good for the game

A ton of decimals is WACK


# Testing Photographs and Procedure
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<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog

:cl: Morrow
add: Rounded oxyloss from bloodloss
/:cl:

code/modules/mob/living/blood.dm

@@ -41,7 +41,7 @@
 			/// The limit of the oxyloss gained, ignoring oxyloss from the switch statement
 			var/maximum_oxyloss = Clamp((100 - blood_percentage) / 2, oxyloss, 100)
 			if(oxyloss < maximum_oxyloss)
-				oxyloss += max(additional_oxyloss, 0)
+				oxyloss += round(max(additional_oxyloss, 0))
 
 			//Bloodloss effects on nutrition
 			if(nutrition >= 300)