File opensc-gcc11.patch of Package opensc

diff --git a/src/tools/opensc-explorer.c b/src/tools/opensc-explorer.c
index 41e620a..57f8a79 100644
--- a/src/tools/opensc-explorer.c
+++ b/src/tools/opensc-explorer.c
@@ -1839,6 +1839,12 @@ static int do_apdu(int argc, char **argv)
 	if (argc < 1)
 		return usage(do_apdu);
 
+	/* gcc-11 complains about BUF potentially being used without being
+	   initialized.  I can't convince myself that the calls to
+	   parse_string_or_hexdata will fully initialize it, so we just
+	   initialize it here.  */
+	memset (buf, 0, sizeof (buf));
+
 	/* loop over the args and parse them, making sure the result fits into buf[] */
 	for (i = 0, len = 0; i < (unsigned) argc && len < sizeof(buf); i++)   {
 		size_t len0 = sizeof(buf) - len;
commit 1680b3a1fb15319e41dbe3214ef8c4a4c215d529
Author: Jakub Jelen <jjelen@redhat.com>
Date:   Tue Feb 23 19:57:02 2021 +0100

    Fix build on gcc11
    
    This made most of the applications crashing in Fedora 34 when
    smart card was plugged in.
    
    The suggested patch makes the code path more obvious for gcc to
    handle.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1930652