Add missing 'as i2c'

Author: tannewt

adafruit_register/i2c_bcd_alarm.py

@@ -95,7 +95,7 @@ def __init__(self, register_address, has_seconds=True, weekday_shared=True, week
 
     def __get__(self, obj, objtype=None):
         # Read the alarm register.
-        with obj.i2c_device:
+        with obj.i2c_device as i2c:
             i2c.write_then_readinto(self.buffer, self.buffer, out_end=1, in_start=1)
 
         frequency = None

adafruit_register/i2c_bcd_datetime.py

@@ -77,7 +77,7 @@ def __init__(self, register_address, weekday_first=True, weekday_start=1):
 
     def __get__(self, obj, objtype=None):
         # Read and return the date and time.
-        with obj.i2c_device:
+        with obj.i2c_device as i2c:
             i2c.write_then_readinto(self.buffer, self.buffer, out_end=1, in_start=1)
         return time.struct_time((_bcd2bin(self.buffer[7]) + 2000,
                                  _bcd2bin(self.buffer[6]),