Don't cast return value of [cm]alloc

Change-Id: I0028a5b6757b1ba00031893d9a2a1725f915a0d5
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/2069
Tested-by: jenkins
Reviewed-by: Jörg Wunsch <openocd@uriah.heep.sax.de>
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

src/helper/replacements.c

@@ -123,7 +123,7 @@ size_t strnlen(const char *s, size_t maxlen)
 char *strndup(const char *s, size_t n)
 {
 	size_t len = strnlen(s, n);
-	char *new = (char *) malloc(len + 1);
+	char *new = malloc(len + 1);
 
 	if (new == NULL)
 		return NULL;