Fix coding style

- Use block for single statement ifs
- Keep lines to reasonable length (current debate as to reasonable)
- When functions return -1 for error test against 0 not -1
- Do not indent cases another level
- Do not test against NULL and 0 explicitly
- Use tabs for indentation, use spaces for alignment

util.c

@@ -16,8 +16,9 @@ bprintf(const char *fmt, ...)
 	len = vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
 	va_end(ap);
 
-	if (len >= sizeof(buf))
+	if (len >= sizeof(buf)) {
 		buf[sizeof(buf)-1] = '\0';
+	}
 
 	return buf;
 }