Fix types-related warnings based on clang diagnostics

1. Fix some places where unsigned value compared < 0
2. Fix obsolete %Z specifier to more portable %z
3. Some erroneous types substitution
4. nl_msec2str() - 64-bit msec is now properly used,

Only safe changes. I mean int <--> uint32_t and signed/unsigned fixes.
Some functinos require size_t argument instead of int, but changes of
signatures of that functions is terrible thing.

Also, I do not pretend for a full list of fixes.
Just to shut up clang -Wall -Wextra

One more thing. ifindex. I don't change that because changes will
be too big for simple fix.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/route/cls/u32.c b/lib/route/cls/u32.c
index 331e714..d3e326d 100644
--- a/lib/route/cls/u32.c
+++ b/lib/route/cls/u32.c
@@ -116,7 +116,7 @@ static int u32_msg_parser(struct rtnl_tc *tc, void *data)
 
 	if (tb[TCA_U32_PCNT]) {
 		struct tc_u32_sel *sel;
-		int pcnt_size;
+		size_t pcnt_size;
 
 		if (!tb[TCA_U32_SEL]) {
 			err = -NLE_MISSING_ATTR;