dmesg: fix segfqult

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An element declared as size_t cannot be detected as negative (len < 0
is always false).
This can lead to an infinite loop causing a segmentation fault.
Use an int to solve this issue

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@xxxxxxxxxxxx>
---
 sys-utils/dmesg.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/sys-utils/dmesg.c b/sys-utils/dmesg.c
index 867581d..91855a1 100644
--- a/sys-utils/dmesg.c
+++ b/sys-utils/dmesg.c
@@ -362,7 +362,7 @@ static void safe_fwrite(const char *buf, size_t
size, FILE *out)

 #ifdef HAVE_WIDECHAR
 		wchar_t wc;
-		size_t len = mbrtowc(&wc, p, size - i, &s);
+		int len = mbrtowc(&wc, p, size - i, &s);

 		if (len == 0)				/* L'\0' */
 			return;
-- 
1.7.6.134.gcf13f6.dirty
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