Android: fixes (again) bb_device_status_check.

build/android/buildbot/bb_device_status_check.py

Index: build/android/buildbot/bb_device_status_check.py
diff --git a/build/android/buildbot/bb_device_status_check.py b/build/android/buildbot/bb_device_status_check.py
index ef9819d8efbe32c1aa57d5a9b37777ba63ebb616..452eea796c8083f9b45556031ea1cc3899519bc0 100755
--- a/build/android/buildbot/bb_device_status_check.py
+++ b/build/android/buildbot/bb_device_status_check.py
@@ -60,8 +60,9 @@ def DeviceInfo(serial, options):
     battery_temp = float(re.findall('temperature: (\d+)', battery)[0]) / 10
   sub_info = device_adb.GetSubscriberInfo()
   imei_slice = ''
-  if sub_info and len(sub_info):
-    imei_slice = re.findall('Device ID = (\d+)', sub_info)[0][-6:]
+  device_id = re.findall('Device ID = (\d+)', sub_info)
+  if device_id and len(device_id):
+    imei_slice = device_id[0][-6:]
   report = ['Device %s (%s)' % (serial, device_type),
             '  Build: %s (%s)' %
               (device_build, device_adb.GetBuildFingerprint()),