* pipe.cc (fhandler_pipe::create): Avoid derefencing a NULL pointer.

* child_info.h (child_info): Reorganize some elements so that the ones which
are initialized in a constructor are all together.
* sigproc.cc (child_info::child_info): Initialize values via the constructor
rather than as C statements and make sure that flags is set to zero initially.
* spawn.cc (child_info_spawn::worker): Use iscygwin() test for determining when
to send strace info since it is more foolproof than checking the suspend state.

winsup/cygwin/pipe.cc

@@ -264,14 +264,14 @@ fhandler_pipe::create (LPSECURITY_ATTRIBUTES sa_ptr, PHANDLE r, PHANDLE w,
 	  /* The pipe is already open with compatible parameters.
 	     Pick a new name and retry.  */
 	  debug_printf ("pipe busy", !name ? ", retrying" : "");
-	  if (!*name)
+	  if (!name)
 	    *r = NULL;
 	  break;
 	case ERROR_ACCESS_DENIED:
 	  /* The pipe is already open with incompatible parameters.
 	     Pick a new name and retry.  */
 	  debug_printf ("pipe access denied%s", !name ? ", retrying" : "");
-	  if (!*name)
+	  if (!name)
 	    *r = NULL;
 	  break;
 	default: