bug: Assign values once in bug_get_file_line()

Set bug_get_file_line()'s output parameter values directly rather than
first nullifying them and then conditionally setting new values.

Signed-off-by: Andrew Scull <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: "Steven Rostedt (VMware)" <[e-mail]>
Acked-by: Will Deacon <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

lib/bug.c

···
 void bug_get_file_line(struct bug_entry *bug, const char **file,
 		       unsigned int *line)
 {
-	*file = NULL;
-	*line = 0;
-
 #ifdef CONFIG_DEBUG_BUGVERBOSE
 #ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
 	*file = bug->file;
···
 	*file = (const char *)bug + bug->file_disp;
 #endif
 	*line = bug->line;
+#else
+	*file = NULL;
+	*line = 0;
 #endif
 }