change chan osc range - PLEASE READ

as of now the range is ~32768, either from -16384 to 16383, or 0 to 32767.
it previously was -32768 to 32767 (~65536).

this change was made to better suit chips that only output a positive value.
if you are working on a new chip, update your code and shift right by one if necessary.

src/engine/platform/msm6258.cpp

@@ -84,7 +84,7 @@ void DivPlatformMSM6258::acquire(short** buf, size_t len) {
     } else {
       buf[0][h]=(msmPan&2)?msmOut:0;
       buf[1][h]=(msmPan&1)?msmOut:0;
-      oscBuf[0]->data[oscBuf[0]->needle++]=msmPan?msmOut:0;
+      oscBuf[0]->data[oscBuf[0]->needle++]=msmPan?(msmOut>>1):0;
     }
   }
 }