* progmodes/idlwave.el (idlwave-make-tags):

* progmodes/idlwave.el (idlwave-make-tags):
* textmodes/flyspell.el (flyspell-large-region):.
* progmodes/make-mode.el (makefile-query-by-make-minus-q):
* emulation/viper-util.el (viper-glob-unix-files):
* emacs-lisp/shadow.el (shadow-same-file-or-nonexistent):
* man.el (Man-init-defvars):
* jka-compr.el (jka-compr-call-process):
* files.el (get-free-disk-space,insert-directory):
* ediff-ptch.el (ediff-test-patch-utility):
* ediff-diff.el (ediff-test-utility):
* dired-aux.el (dired-check-process):
* mail/sendmail.el (sendmail-send-it): Don't use = or zerop to
test the return value of call-process, because it can be a string.