Avoid using aliases for color functions

Avoid using aliases for color functions

* lisp/emulation/viper-init.el (viper-has-face-support-p):
* lisp/emulation/viper-util.el (viper-save-cursor-color)
(viper-change-cursor-color):
* lisp/faces.el (read-color):
* lisp/net/dictionary.el (dictionary-color-support):
* lisp/obsolete/gs.el (gs-set-ghostview-colors-window-prop):
* lisp/progmodes/cperl-mode.el (cperl-choose-color):
* lisp/woman.el (woman-fontify): Avoid using aliases for
color-defined-p, display-color-p, and color-values.