fix '\0' bug from score-only positional annotation

diff --git a/src/jalview/datamodel/Annotation.java b/src/jalview/datamodel/Annotation.java
index 824c4be..9fc69bb 100755 (executable)
--- a/src/jalview/datamodel/Annotation.java
+++ b/src/jalview/datamodel/Annotation.java
@@ -101,6 +101,6 @@ public class Annotation
    */
   public Annotation(float val)
   {
-    this(null, null, '\0', val);
+    this(null, null, ' ', val);
   }
 }