determine breath val on selected val (KMKfw#865)

Determine breath val on selected val

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Co-authored-by: xs5871 <60395129+xs5871@users.noreply.github.com>

kmk/extensions/rgb.py

@@ -482,11 +482,11 @@ def effect_breathing(self):
         # https://github.com/qmk/qmk_firmware/blob/9f1d781fcb7129a07e671a46461e501e3f1ae59d/quantum/rgblight.c#L806
         sined = sin((self.pos / 255.0) * pi)
         multip_1 = exp(sined) - self.breathe_center / e
-        multip_2 = self.val_limit / (e - 1 / e)
+        multip_2 = self.val / (e - 1 / e)
 
-        self.val = int(multip_1 * multip_2)
+        val = int(multip_1 * multip_2)
         self.pos = (self.pos + self._step) % 256
-        self.set_hsv_fill(self.hue, self.sat, self.val)
+        self.set_hsv_fill(self.hue, self.sat, val)
 
     def effect_breathing_rainbow(self):
         self.increase_hue(self._step)