change default value of g:cpatch_path from "~/.vim/cpatch" to "~/.vim/colors/patch"

Author: skywind3000

plugin/cpatch.vim

@@ -36,7 +36,7 @@
 "----------------------------------------------------------------------
 
 " color patch path: script will be searched here
-let g:cpatch_path = get(g:, 'cpatch_path', '~/.vim/color/patch')
+let g:cpatch_path = get(g:, 'cpatch_path', '~/.vim/colors/patch')
 
 " color patch subdirectory in every runtime path
 let g:cpatch_name = get(g:, 'cpatch_name', '')