gsm library port to msvc, fix some warnings.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@168 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/codec/gsm/src/decode.c

@@ -25,7 +25,7 @@ static void Postprocessing P2((S,s),
 	register word		tmp;
 
 	for (k = 160; k--; s++) {
-		tmp = GSM_MULT_R( msr, 28180 );
+		tmp = (word)GSM_MULT_R( msr, 28180 );
 		msr = GSM_ADD(*s, tmp);  	   /* Deemphasis 	     */
 		*s  = GSM_ADD(msr, msr) & 0xFFF8;  /* Truncation & Upscaling */
 	}