add preedit to ipc

strans.c

@@ -312,6 +312,13 @@ imthread(void*)
 				out[1] = len;
 				n += len;
 			}
+			if(kr.want){
+				len = im.pre.n > 0 ?
+					stoutf(&im.pre, (char*)(out+n+1),
+						sizeof(out)-n-1) : 0;
+				out[n] = len;
+				n += 1 + len;
+			}
 			write(kr.fd, out, n);
 			break;
 		case 1: