[Powertop] [PATCH 2/2] devlist: NULL terminate struct devuser fields

As strncpy doesn't guarantee the destination buffer is NULL-
terminated, do it explicitly.

Signed-off-by: Namhyung Kim <namhyung(a)gmail.com>
---
 src/devlist.cpp |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/devlist.cpp b/src/devlist.cpp
index 828f47f..71898af 100644
--- a/src/devlist.cpp
+++ b/src/devlist.cpp
@@ -147,7 +147,9 @@ void collect_open_devices(void)
 					continue;
 				dev->pid = strtoull(entry->d_name, NULL, 10);
 				strncpy(dev->device, link, 251);
+				dev->device[251] = '\0';
 				strncpy(dev->comm, read_sysfs_string("/proc/%s/comm", entry->d_name).c_str(), 31);
+				dev->comm[31] = '\0';
 				target->push_back(dev);
 
 			}
-- 
1.7.9.2