perf disasm: Avoid undefined behavior in incrementing NULL

Incrementing NULL is undefined behavior and triggers ubsan during the
perf annotate test.

Split a compound statement over two lines to avoid this.

Fixes: 98f69a573c668a18 ("perf annotate: Split out util/disasm.c")
Reviewed-by: Collin Funk <[e-mail]>
Reviewed-by: James Clark <[e-mail]>
Reviewed-by: Kuan-Wei Chiu <[e-mail]>
Signed-off-by: Ian Rogers <[e-mail]>
Acked-by: Namhyung Kim <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Athira Rajeev <[e-mail]>
Cc: Blake Jones <[e-mail]>
Cc: Chun-Tse Shao <[e-mail]>
Cc: Howard Chu <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Jan Polensky <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: Li Huafei <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Nam Cao <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Steinar H. Gunderson <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/util/disasm.c

···
 	 * skip over possible up to 2 operands to get to address, e.g.:
 	 * tbnz	 w0, #26, ffff0000083cd190 <security_file_permission+0xd0>
 	 */
-	if (c++ != NULL) {
+	if (c != NULL) {
+		c++;
 		ops->target.addr = strtoull(c, NULL, 16);
 		if (!ops->target.addr) {
 			c = strchr(c, ',');
 			c = validate_comma(c, ops);
-			if (c++ != NULL)
+			if (c != NULL) {
+				c++;
 				ops->target.addr = strtoull(c, NULL, 16);
+			}
 		}
 	} else {
 		ops->target.addr = strtoull(ops->raw, NULL, 16);