heater: Use printer.command_error() instead of internal heater.error()

Use the more standard command_error to report invalid temperature
requests.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/extras/pid_calibrate.py

@@ -28,9 +28,9 @@ class PIDCalibrate:
         old_control = heater.set_control(calibrate)
         try:
             heater.set_temp(print_time, target)
-        except heater.error as e:
+        except self.printer.command_error as e:
             heater.set_control(old_control)
-            raise self.gcode.error(str(e))
+            raise
         self.gcode.bg_temp(heater)
         heater.set_control(old_control)
         if write_file:

klippy/gcode.py

@@ -418,10 +418,7 @@ class GCodeParser:
                 self.respond_error("Heater not configured")
             return
         print_time = self.toolhead.get_last_move_time()
-        try:
         heater.set_temp(print_time, temp)
-        except heater.error as e:
-            raise self.error(str(e))
         if wait and temp:
             self.bg_temp(heater)
     # G-Code special command handlers

klippy/heater.py

@@ -15,11 +15,7 @@ MAX_HEAT_TIME = 5.0
 AMBIENT_TEMP = 25.
 PID_PARAM_BASE = 255.
 
-class error(Exception):
-    pass
-
 class Heater:
-    error = error
     def __init__(self, config, sensor):
         self.printer = config.get_printer()
         self.gcode = self.printer.lookup_object("gcode")
@@ -103,7 +99,8 @@ class Heater:
         return self.smooth_time
     def set_temp(self, print_time, degrees):
         if degrees and (degrees < self.min_temp or degrees > self.max_temp):
-            raise error("Requested temperature (%.1f) out of range (%.1f:%.1f)"
+            raise self.printer.command_error(
+                "Requested temperature (%.1f) out of range (%.1f:%.1f)"
                 % (degrees, self.min_temp, self.max_temp))
         with self.lock:
             self.target_temp = degrees