Fix pty setup code on AIX

This commit was SVN r24363.

opal/util/opal_pty.c

@@ -171,7 +171,11 @@ static int ptym_open(char *pts_name)
 #ifdef HAVE_PTSNAME
     char *ptr;
 
+#ifdef _AIX
+    strcpy(pts_name, "/dev/ptc");
+#else
     strcpy(pts_name, "/dev/ptmx");
+#endif
     fdm = open(pts_name, O_RDWR);
     if (fdm < 0) {
         return -1;
@@ -228,6 +232,7 @@ static int ptys_open(int fdm, char *pts_name)
         close(fdm);
         return -5;
     }
+#ifdef __sun
     if (ioctl(fds, I_PUSH, "ptem") < 0) {
         close(fdm);
         close(fds);
@@ -238,6 +243,7 @@ static int ptys_open(int fdm, char *pts_name)
         close(fds);
         return -7;
     }
+#endif
 
     return fds;
 #else