BUILD: don't use type "uint" which is not portable

Dmitry Sivachenko reported that "uint" doesn't build on FreeBSD 10.
On Linux it's defined in sys/types.h and indicated as "old". Just
get rid of the very few occurrences.
diff --git a/src/standard.c b/src/standard.c
index 9cec295..06176d7 100644
--- a/src/standard.c
+++ b/src/standard.c
@@ -2416,8 +2416,8 @@
 const char *strnistr(const char *str1, int len_str1, const char *str2, int len_str2)
 {
 	char *pptr, *sptr, *start;
-	uint slen, plen;
-	uint tmp1, tmp2;
+	unsigned int slen, plen;
+	unsigned int tmp1, tmp2;
 
 	if (str1 == NULL || len_str1 == 0) // search pattern into an empty string => search is not found
 		return NULL;