cmProc.c: Chnaged labs() to fabs() in calc of 'dLogProb' in cmChmmTrain().

cmProc.c

     cmReal_t logProb0 =  cmChmmForward( p, oM, T, alphaM, logPrV );
 
     // check for convergence
-    cmReal_t dLogProb =  labs(logProb0-logProb) / ((labs(logProb0)+labs(logProb)+cmReal_EPSILON)/2);
+    cmReal_t dLogProb =  fabs(logProb0-logProb) / ((fabs(logProb0)+fabs(logProb)+cmReal_EPSILON)/2);
     if( dLogProb < thresh )
       break;