Fix for getFlatIcon runtimes. I think when I changed DamageIcons from a list to a single image, I may have caused it. Basically, null was getting put in the overlays var at round start.

Fix for  view-vars refreshing.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@3721 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/mob/living/carbon/human/human.dm

@@ -819,16 +819,14 @@
 
 	if (lying)
 		icon = lying_icon
-
-		overlays += damageicon_lying
-
+		if(damageicon_lying)
+			overlays += damageicon_lying
 		if (face_lying)
 			overlays += face_lying
 	else
 		icon = stand_icon
-
-		overlays += damageicon_standing
-
+		if(damageicon_lying)
+			overlays += damageicon_standing
 		if (face_standing)
 			overlays += face_standing