[PATCH] perf probe: check if *ptr2 is zero and not ptr2

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

Static anaylsis with cppcheck detected an incorrect comparison:
[tools/perf/util/probe-event.c:216]: (warning) Char literal compared with
pointer 'ptr2'. Did you intend to dereference it?

Dereference ptr2 for the comparison to fix this.

Fixes: 35726d3a4ca9 ("perf probe: Fix to cut off incompatible chars from group 
name")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 tools/perf/util/probe-event.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index fcfbef0..d281ae2 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -213,7 +213,7 @@ static int convert_exec_to_group(const char *exec, char 
**result)
                goto out;
        }
 
-       for (ptr2 = ptr1; ptr2 != '\0'; ptr2++) {
+       for (ptr2 = ptr1; *ptr2 != '\0'; ptr2++) {
                if (!isalnum(*ptr2) && *ptr2 != '_') {
                        *ptr2 = '\0';
                        break;
-- 
2.9.3