zxdiv: fix control (both shift) mode

diff --git a/Kernel/platform-zxdiv/devtty.c b/Kernel/platform-zxdiv/devtty.c
index d72d24f..617303c 100644 (file)
--- a/Kernel/platform-zxdiv/devtty.c
+++ b/Kernel/platform-zxdiv/devtty.c
@@ -206,7 +206,7 @@ static void keydecode(void)
                                c = cursor[c - '5'];
                }
        }
-       if (ss & cs) {
+       if (ss && cs) {
                m |= KEYPRESS_CTRL;
                c &= 31;
        }