Replaces rewind with more portable fseek



git-svn-id: svn+ssh://svn.code.sf.net/p/cmusphinx/code/trunk/sphinxtrain@12474 94700074-3cef-4d97-a70e-9c8c206c02f5
Allow zero-lenght mfc files



git-svn-id: svn+ssh://svn.code.sf.net/p/cmusphinx/code/trunk/sphinxtrain@12483 94700074-3cef-4d97-a70e-9c8c206c02f5
Do not allow to train a model with less than 0.5 hours of data. Those students killing me.



git-svn-id: svn+ssh://svn.code.sf.net/p/cmusphinx/code/trunk/sphinxtrain@12497 94700074-3cef-4d97-a70e-9c8c206c02f5
Respect vector length



git-svn-id: svn+ssh://svn.code.sf.net/p/cmusphinx/code/trunk/sphinxtrain@12506 94700074-3cef-4d97-a70e-9c8c206c02f5