Portability fix

mysys/my_seek.c:
  Remove warning

mysys/my_seek.c

@@ -20,7 +20,8 @@
 	/* Seek to position in file */
 	/*ARGSUSED*/
 
-my_off_t my_seek(File fd, my_off_t pos, int whence, myf MyFlags)
+my_off_t my_seek(File fd, my_off_t pos, int whence,
+		 myf MyFlags __attribute__((unused)))
 {
   reg1 os_off_t newpos;
   DBUG_ENTER("my_seek");
@@ -40,7 +41,7 @@ my_off_t my_seek(File fd, my_off_t pos, int whence, myf MyFlags)
 	/* Tell current position of file */
 	/* ARGSUSED */
 
-my_off_t my_tell(File fd, myf MyFlags)
+my_off_t my_tell(File fd, myf MyFlags __attribute__((unused)))
 {
   os_off_t pos;
   DBUG_ENTER("my_tell");

sql/stacktrace.c

@@ -218,7 +218,7 @@ void write_core(int sig)
 {
   signal(sig, SIG_DFL);
   pthread_kill(pthread_self(), sig);
-#if defined(P_PID) && defined(P_MYID)
+#if defined(P_MYID)
   /* On Solaris, the above kill is not enough */
   sigsend(P_PID,P_MYID,sig);
 #endif