* child_info.h (~child_info_spawn): Check moreinfo->myself_pinfo for

NULL before closing.
	* spawn.cc (spawn_guts): Don't close moreinfo->myself_pinfo explicitely
	in case of failing CloseProcess.

	* fhandler.cc (fhandler_base::open_): Return EISDIR when trying to
	create a directory.
	* path.cc (path_conv::check): If input path had a trailing dir
	separator, tack it on to the native path if directory doesn't exist.

winsup/cygwin/spawn.cc

@@ -599,8 +599,6 @@ loop:
 	  myself->exec_sendsig = NULL;
 	}
       res = -1;
-      if (moreinfo->myself_pinfo)
-	CloseHandle (moreinfo->myself_pinfo);
       goto out;
     }