Fix behaviour of negative fields in virtual corpora

Change-Id: I126bd787d6938af5841ed032c3f18b982263b1b6
diff --git a/pom.xml b/pom.xml
index 76a0896..9cc960b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -35,7 +35,7 @@
 
 	<groupId>de.ids_mannheim.korap</groupId>
 	<artifactId>Krill</artifactId>
-	<version>0.58.6</version>
+	<version>0.58.7</version>
 	<packaging>jar</packaging>
 
 	<name>Krill</name>