Mob fire temperature fix, tweaks

Mob fires are now guaranteed to burn at least as hot as a cold flame -
no more merely warming mobs up slightly with low fire stacks.

Also made mob fires burn hotter overall and resisting slower.

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

@@ -3,14 +3,14 @@
 
 	//drop && roll
 	if(on_fire)
-		fire_stacks -= 2 //reduced
-		Weaken(3)
-		spin(32,2)
+		fire_stacks -= 2
+		Weaken(5)
+		spin(52,2)
 		visible_message(
 			"<span class='danger'>[src] rolls on the floor, trying to put themselves out!</span>",
 			"<span class='notice'>You stop, drop, and roll!</span>"
 			)
-		sleep(30)
+		sleep(50)
 		if(fire_stacks <= 0)
 			visible_message(
 				"<span class='danger'>[src] has successfully extinguished themselves!</span>",

code/modules/mob/living/living_defense.dm

@@ -236,7 +236,7 @@
 	location.hotspot_expose(fire_burn_temperature(), 50, 1)
 
 /mob/living/fire_act()
-	adjust_fire_stacks(0.5)
+	adjust_fire_stacks(2)
 	IgniteMob()
 
 //Finds the effective temperature that the mob is burning at.
@@ -245,4 +245,5 @@
 		return 0
 
 	//Scale quadratically so that single digit numbers of fire stacks don't burn ridiculously hot.
-	return round(FIRESUIT_MAX_HEAT_PROTECTION_TEMPERATURE*(fire_stacks/FIRE_MAX_FIRESUIT_STACKS)**2)
+	//lower limit of 700 K, same as matches and roughly the temperature of a cool flame. 
+	return max(2.25*round(FIRESUIT_MAX_HEAT_PROTECTION_TEMPERATURE*(fire_stacks/FIRE_MAX_FIRESUIT_STACKS)**2), 700)