am 8b1243e5: jni: GpsLocationProvider: Check for pending callbacks before waiting

Merge commit '8b1243e5e4930598e8e78ebd18e7b6cd6fb0445f' into eclair-plus-aosp

* commit '8b1243e5e4930598e8e78ebd18e7b6cd6fb0445f':
  jni: GpsLocationProvider: Check for pending callbacks before waiting