Fix crash when completing nicks with special chars

Not enough space was allocated for the completed text when the word
being completed had characters encoded in more than one byte.  This was
because "word" was a string instead of a []rune, thus "len(word)"
counted each byte instead of each character.

Fixes #42

1 files changed, 2 insertions, 2 deletions

diff --git a/app.go b/app.go
index bd7816e..a27db0f 100644
--- a/app.go
+++ b/app.go
@@ -377,8 +377,8 @@ func (app *App) completions(cursorIdx int, text []rune) []ui.Completion {
 		}
 	}
 	start++
-	word := string(text[start:cursorIdx])
-	wordCf := app.s.Casemap(word)
+	word := text[start:cursorIdx]
+	wordCf := app.s.Casemap(string(word))
 	for _, name := range app.s.Names(app.win.CurrentBuffer()) {
 		if strings.HasPrefix(app.s.Casemap(name.Name.Name), wordCf) {
 			nickComp := []rune(name.Name.Name)