Volt: Don't adjust speed on resume from stopped (#325)

* Don't adjust speed if resuming

* Detab

selfdrive/car/gm/interface.py

@@ -194,7 +194,8 @@ class CarInterface(object):
 
     # cruise state
     ret.cruiseState.available = bool(self.CS.main_on)
-    ret.cruiseState.enabled = self.CS.pcm_acc_status != 0
+    cruiseEnabled = self.CS.pcm_acc_status != 0
+    ret.cruiseState.enabled = cruiseEnabled
     ret.cruiseState.standstill = self.CS.pcm_acc_status == 4
 
     ret.leftBlinker = self.CS.left_blinker_on
@@ -228,7 +229,8 @@ class CarInterface(object):
         be.pressed = False
         but = self.CS.prev_cruise_buttons
       if but == CruiseButtons.RES_ACCEL:
-        be.type = 'accelCruise'
+        if not (cruiseEnabled and self.CS.standstill):
+          be.type = 'accelCruise' # Suppress resume button if we're resuming from stop so we don't adjust speed.
       elif but == CruiseButtons.DECEL_SET:
         be.type = 'decelCruise'
       elif but == CruiseButtons.CANCEL: