[PATCH] iio: generic_buffer: Fix --trigger-num option

[Crestez Dan Leonard]

Initialize trig_num to -1 and handle trig_num=0 as a valid id.

Fixes: 7c7e9dad (iio: iio_generic_buffer: Add --trigger-num option)
Signed-off-by: Crestez Dan Leonard <leonard.cres...@intel.com>
---
 tools/iio/iio_generic_buffer.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/iio/iio_generic_buffer.c b/tools/iio/iio_generic_buffer.c
index e8c3052..0e8a1f7 100644
--- a/tools/iio/iio_generic_buffer.c
+++ b/tools/iio/iio_generic_buffer.c
@@ -341,7 +341,7 @@ int main(int argc, char **argv)
 
        char *data = NULL;
        ssize_t read_size;
-       int dev_num = -1, trig_num;
+       int dev_num = -1, trig_num = -1;
        char *buffer_access = NULL;
        int scan_size;
        int noevents = 0;
@@ -456,7 +456,7 @@ int main(int argc, char **argv)
 
        if (notrigger) {
                printf("trigger-less mode selected\n");
-       } if (trig_num > 0) {
+       } if (trig_num >= 0) {
                char *trig_dev_name;
                ret = asprintf(&trig_dev_name, "%strigger%d", iio_dir, 
trig_num);
                if (ret < 0) {
-- 
2.5.5