Convert a time string to the equivalent number in minutes as an int.
		Return 0 if the time_str is not a valid amount of time.

		>>> jump = JumprunProApi('skydive-warren-county')
		>>> jump._time_to_minutes('34 minutes')
		34
		>>> jump._time_to_minutes('1 hour, 30 minutes')
		90
		>>> jump._time_to_minutes('jfksadjfkas')
		0

def _time_to_minutes(self, time_str):
		"""
		Convert a time string to the equivalent number in minutes as an int.
		Return 0 if the time_str is not a valid amount of time.

		>>> jump = JumprunProApi('skydive-warren-county')
		>>> jump._time_to_minutes('34 minutes')
		34
		>>> jump._time_to_minutes('1 hour, 30 minutes')
		90
		>>> jump._time_to_minutes('jfksadjfkas')
		0
		"""
		minutes = 0
		try:
			call_time_obj = parser.parse(time_str)

			minutes = call_time_obj.minute
			minutes += call_time_obj.hour * 60
		except ValueError:
			minutes = 0

		return minutes