improve Coffeescript guard in JS support

Author: ap

after/syntax/javascript.vim

@@ -6,7 +6,7 @@
 " so until it has specific support there's no point in loading anyway
 " and for some reason the W3C syntax color keywords break its highlighting
 " (this refers to the https://github.com/kchmck/vim-coffee-script plugin)
-if &filetype == 'coffee' | finish | endif
+if -1 < index( split( &filetype, '[.]' ), 'coffee' ) | finish | endif
 
 " javaScriptX = default Vim syntax, jsX = https://github.com/pangloss/vim-javascript
 call css_color#init('hex', 'extended'

autoload/css_color.vim

@@ -255,14 +255,14 @@ function! css_color#reinit()
 endfunction
 
 function! css_color#enable()
-	exe 'syn cluster colorableGroup add=' . join( b:css_color_grp, ',' )
+	if len( b:css_color_grp ) | exe 'syn cluster colorableGroup add=' . join( b:css_color_grp, ',' ) | endif
 	autocmd CSSColor CursorMoved,CursorMovedI <buffer> call s:parse_screen()
 	let b:css_color_off = 0
 	call s:parse_screen()
 endfunction
 
 function! css_color#disable()
-	exe 'syn cluster colorableGroup remove=' . join( b:css_color_grp, ',' )
+	if len( b:css_color_grp ) | exe 'syn cluster colorableGroup remove=' . join( b:css_color_grp, ',' ) | endif
 	autocmd! CSSColor CursorMoved,CursorMovedI <buffer>
 	let b:css_color_off = 1
 endfunction