short fix for + splitting

appointment-import/src/main/java/smash/appointment/parse/LihControlParser.java

@@ -149,7 +149,7 @@ public class LihControlParser extends SubjectParser {
 		if (languages.indexOf(",") >= 0) {
 			langAbbreviations = languages.split(",");
 		} else if (languages.indexOf("+") >= 0) {
-			langAbbreviations = languages.split("+");
+			langAbbreviations = languages.split("\\+");
 		} else {
 			langAbbreviations = languages.split("/");
 		}