Add new lints (#49751)

Co-authored-by: Jordan Brown <Cyberboss@users.noreply.github.com>

code/modules/mob/living/living.dm

@@ -899,8 +899,8 @@
 	var/amplitude = min(4, (jitteriness/100) + 1)
 	var/pixel_x_diff = rand(-amplitude, amplitude)
 	var/pixel_y_diff = rand(-amplitude/3, amplitude/3)
-	var/final_pixel_x = get_standard_pixel_x_offset(lying)
-	var/final_pixel_y = get_standard_pixel_y_offset(lying)
+	var/final_pixel_x = get_standard_pixel_x_offset(!(mobility_flags & MOBILITY_STAND))
+	var/final_pixel_y = get_standard_pixel_y_offset(!(mobility_flags & MOBILITY_STAND))
 	animate(src, pixel_x = pixel_x + pixel_x_diff, pixel_y = pixel_y + pixel_y_diff , time = 2, loop = 6)
 	animate(pixel_x = final_pixel_x , pixel_y = final_pixel_y , time = 2)
 	setMovetype(movement_type & ~FLOATING) // If we were without gravity, the bouncing animation got stopped, so we make sure to restart it in next life().

code/modules/mob/living/living_defines.dm

@@ -28,7 +28,7 @@
 
 	var/resting = FALSE
 
-	var/lying = 0			///number of degrees. DO NOT USE THIS IN CHECKS. CHECK FOR MOBILITY FLAGS INSTEAD!!
+	VAR_PROTECTED/lying = 0			///number of degrees. DO NOT USE THIS IN CHECKS. CHECK FOR MOBILITY FLAGS INSTEAD!!
 	var/lying_prev = 0		///last value of lying on update_mobility
 
 	var/confused = 0	///Makes the mob move in random directions.

code/modules/mob/mob_helpers.dm

@@ -287,6 +287,7 @@
 
 ///Checks if the mob is able to see or not. eye_blind is temporary blindness, the trait is if they're permanently blind.
 /mob/proc/is_blind()
+	SHOULD_BE_PURE(TRUE)
 	return eye_blind ? TRUE : HAS_TRAIT(src, TRAIT_BLIND)
 
 ///Is the mob hallucinating?