OPN: fix block not working on ExtCh

issue #2504

src/engine/platform/genesisext.cpp

@@ -37,6 +37,7 @@ void DivPlatformGenesisExt::commitStateExt(int ch, DivInstrument* ins) {
     }
     chan[extChanOffs].state.fms=ins->fm.fms;
     chan[extChanOffs].state.ams=ins->fm.ams;
+    chan[extChanOffs].state.block=ins->fm.block;
     chan[extChanOffs].state.op[ordch]=ins->fm.op[ordch];
   }
   

src/engine/platform/ym2203ext.cpp

@@ -31,6 +31,7 @@ void DivPlatformYM2203Ext::commitStateExt(int ch, DivInstrument* ins) {
     if (ch==0 || fbAllOps) {
       chan[2].state.fb=ins->fm.fb;
     }
+    chan[extChanOffs].state.block=ins->fm.block;
     chan[2].state.op[ordch]=ins->fm.op[ordch];
   }
   

src/engine/platform/ym2608ext.cpp

@@ -34,6 +34,7 @@ void DivPlatformYM2608Ext::commitStateExt(int ch, DivInstrument* ins) {
     }
     chan[2].state.fms=ins->fm.fms;
     chan[2].state.ams=ins->fm.ams;
+    chan[extChanOffs].state.block=ins->fm.block;
     chan[2].state.op[ordch]=ins->fm.op[ordch];
   }
   

src/engine/platform/ym2610bext.cpp

@@ -30,6 +30,7 @@ void DivPlatformYM2610BExt::commitStateExt(int ch, DivInstrument* ins) {
     }
     chan[extChanOffs].state.fms=ins->fm.fms;
     chan[extChanOffs].state.ams=ins->fm.ams;
+    chan[extChanOffs].state.block=ins->fm.block;
     chan[extChanOffs].state.op[ordch]=ins->fm.op[ordch];
   }
   

src/engine/platform/ym2610ext.cpp

@@ -30,6 +30,7 @@ void DivPlatformYM2610Ext::commitStateExt(int ch, DivInstrument* ins) {
     }
     chan[extChanOffs].state.fms=ins->fm.fms;
     chan[extChanOffs].state.ams=ins->fm.ams;
+    chan[extChanOffs].state.block=ins->fm.block;
     chan[extChanOffs].state.op[ordch]=ins->fm.op[ordch];
   }