#1 add meaningful error when no DB

[Anonymous]

When started with no initialized DB, the current failure mode is pretty useless.

% ./geoqo
DBD::SQLite2::st execute failed: no such table: parameters(1) at dbdimp.c line 412 at GeoDB/DB.pm line 286.
DBD::SQLite2::db do failed: no such table: waypoints(1) at dbdimp.c line 412 at GeoDB/DB.pm line 321.
DBD::SQLite2::db do failed: no such table: waypoints(1) at dbdimp.c line 412 at GeoDB/DB.pm line 321.

[Wes Hardaker]

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it now initializes the default db or prints a warning if you're using a non-default DB.

(not true for non-sqlite DBs still).