Use (featurep 'xemacs).

Use (featurep 'xemacs).
(flymake-makehash): Change to defsubst. Use fboundp.
(flymake-time-to-float): Remove.
(flymake-float-time): Merge code from flymake-time-to-float here.
(flymake-replace-regexp-in-string): Change to defsubst.
(flymake-split-string-remove-empty-edges): Rename to flymake-split-string.
(flymake-split-string): Remove previous defalias.
(flymake-get-temp-dir): Change to defsubst.
(flymake-make-xemacs-menu, flymake-xemacs-window-edges): Define
for xemacs only.
(flymake-master-file-count-limit): Change into compiler defvar only.
(flymake-find-possible-master-files): Let-bind it dynamically while
sorting files using flymake-master-file-compare.