libtraceevent: Fix uninitialized has_0x compiler warning

Initialize has_0x in order to supress the following compiler warning:

  event-parse.c:5654:20: warning: 'has_0x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   5654 |                 if (has_0x)
        |                    ^
  event-parse.c:5619:14: note: 'has_0x' was declared here
   5619 |         bool has_0x;
        |              ^~~~~~

Link: https://lore.kernel.org/linux-trace-devel/20220930111002.6107-2-mpetlan@redhat.com

Signed-off-by: Michael Petlan <mpetlan@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
1 file changed