Do not initialize a var to a val that's never used

By initializing 'to' to a value, the code made it seem like that
value mattered. But the value is overwritten in getWord().

Further, now if 'to' is used before it is initialized, there might
be a useful compiler warning that could point to a bug.

src/Text.cpp

@@ -1266,7 +1266,7 @@ void Text::selectWord(Cursor & cur, word_location loc)
 {
 	LBUFERR(this == cur.text());
 	CursorSlice from = cur.top();
-	CursorSlice to = cur.top();
+	CursorSlice to;
 	getWord(from, to, loc);
 	if (cur.top() != from)
 		setCursor(cur, from.pit(), from.pos());