Put all these at the beginning of your code.

Code:
@ DEVICE pic12F675, INTRC_OSC_NOCLKOUT 
@ DEVICE pic12F675, WDT_ON
@ DEVICE pic12F675, PWRT_ON
@ DEVICE pic12F675, MCLR_OFF
@ DEVICE pic12F675, BOD_OFF
@ DEVICE pic12F675, CPD_OFF
@ DEVICE pic12F675, PROTECT_OFF


DEFINE OSCCAL_1K    1   ' osc calibration

CMCON = 7               ' Disable comparators.
VRCON.7 = 0             ' Disable voltage reference module ; no current.
TRISIO = %000000        ' All output except for GP3.
ADCON0.0 = 0            ' Turn off ADC module.
ANSEL = 0               ' Digital I/O.