Aligner with unigram doesn't work yet



git-svn-id: http://svn.code.sf.net/p/cmusphinx/code/trunk@12605 94700074-3cef-4d97-a70e-9c8c206c02f5
Don't do bad things for empty mfcc files



git-svn-id: http://svn.code.sf.net/p/cmusphinx/code/trunk@12606 94700074-3cef-4d97-a70e-9c8c206c02f5