*: hopefully all setup_common_bufsiz() are in place

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

miscutils/microcom.c

@@ -156,11 +156,11 @@ int microcom_main(int argc UNUSED_PARAM, char **argv)
 skip_write: ;
 		}
 		if (pfd[0].revents) {
-#define        iobuf bb_common_bufsiz1
-#define sizeof_iobuf COMMON_BUFSIZE
 			ssize_t len;
+#define iobuf bb_common_bufsiz1
+			setup_common_bufsiz();
 			// read from device -> write to stdout
-			len = safe_read(sfd, iobuf, sizeof_iobuf);
+			len = safe_read(sfd, iobuf, COMMON_BUFSIZE);
 			if (len > 0)
 				full_write(STDOUT_FILENO, iobuf, len);
 			else {