Eliminate some hcs12 compile errors/warnings

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2329 42af7a65-404d-4744-a932-0658087f49c3

include/signal.h

@@ -59,7 +59,7 @@
 #define ALL_SIGNAL_SET  ((sigset_t)0xffffffff)
 #define MIN_SIGNO       0
 #define MAX_SIGNO       31
-#define GOOD_SIGNO(s)   (((s)>=MIN_SIGNO)&&((s)<=MAX_SIGNO))
+#define GOOD_SIGNO(s)   ((((unsigned)(s))<=MAX_SIGNO))
 #define SIGNO2SET(s)    ((sigset_t)1 << (s))
 
 /* All signals are "real time" signals */

include/sys/types.h

@@ -135,6 +135,15 @@ typedef int          STATUS;
 typedef unsigned int socklen_t;
 typedef uint16       sa_family_t;
 
+/* The type useconds_t shall be an unsigned integer type capable of storing
+ * values at least in the range [0, 1000000]. The type suseconds_t shall be
+ * a signed integer type capable of storing values at least in the range
+ * [-1, 1000000].
+ */
+
+typedef uint32       useconds_t;
+typedef sint32       suseconds_t;
+
 /* Task entry point */
 
 typedef int (*main_t)(int argc, char *argv[]);

include/unistd.h

@@ -132,7 +132,7 @@ EXTERN int       optopt; /* unrecognized option character */
 EXTERN pid_t   getpid(void);
 EXTERN void    _exit(int status) noreturn_function;
 EXTERN unsigned int sleep(unsigned int seconds);
-EXTERN void    usleep(unsigned long usec);
+EXTERN void    usleep(useconds_t usec);
 
 /* File descriptor operations */