sanity checks for getlocale.sh

[GNUser]

curaga, I created a patch for the getlocale.sh script (part of getlocale.tcz). I hope it's helpful.

The purpose is to give the user a red-letter warning in situations where the script is unlikely to work as intended:

1. if the script is running while a prior  mylocale.tcz  is loaded
2. if the  localedef  step fails
3. if the generated  mylocale.tcz  has a nonsensical size

Any of the above warnings would have prevented me from chasing my tail when using getlocale.tcz in the recent past.

[curaga]

The last two are ok, but instead of warning for an existing mylocale.tcz, it should be ok to sudo rm the existing locale archive.

[GNUser]

I have to admit that's a much better idea. How about this?

[curaga]

Thanks! Posted to 11.x x86 and x86_64.