cmDspKr.c : Fixed uninitialized variable warning (n in _cmDspRecdPlayExec()).

dsp/cmDspKr.c

 
   const cmSample_t* x[ p->chCnt ];
   cmSample_t*       y[ p->chCnt ];
-  unsigned n;
+  unsigned n = 0;
   unsigned i;
   unsigned actChCnt = 0;