Debugger: Do not warn when nothing is selected

That is the case when the debugger options page was never opened.

Change-Id: If3cb37810ec51d300dca157b2c0c23c6a6e79b49
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
GccToolchain: Whitespace fix

Change-Id: I8121267044b533a882dc9cc15209baa13e37ba6c
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>