Added missing declaration



git-svn-id: svn+ssh://svn.code.sf.net/p/cmusphinx/code/trunk/sphinxbase@12632 94700074-3cef-4d97-a70e-9c8c206c02f5
Don't include unnecessary unistd.h



git-svn-id: svn+ssh://svn.code.sf.net/p/cmusphinx/code/trunk/sphinxbase@12633 94700074-3cef-4d97-a70e-9c8c206c02f5
Proper default device for ALSA



git-svn-id: svn+ssh://svn.code.sf.net/p/cmusphinx/code/trunk/sphinxbase@12634 94700074-3cef-4d97-a70e-9c8c206c02f5