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/transport/transport.c

@@ -206,7 +206,7 @@ COMMAND_HELPER(transport_list_parse, char ***vector)
 		return ERROR_COMMAND_SYNTAX_ERROR;
 
 	/* our return vector must be NULL terminated */
-	argv = (char **) calloc(n + 1, sizeof(char *));
+	argv = calloc(n + 1, sizeof(char *));
 	if (argv == NULL)
 		return ERROR_FAIL;