[tracker] libtracker-sparql: Ensure Builder.length is not 0 when not empty

[Jürg Billeter <juergbi src gnome org>]

commit c736a80f5a1c9baffc017374c03d02c807ec5c81
Author: Jürg Billeter <j bitron ch>
Date:   Tue Apr 5 17:05:47 2011 +0200

    libtracker-sparql: Ensure Builder.length is not 0 when not empty
    
    This caused preupdate fragments from extractors to be dropped in
    certain situations.
    
    Fixes NB#237582.

 src/libtracker-sparql/tracker-builder.vala |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/libtracker-sparql/tracker-builder.vala b/src/libtracker-sparql/tracker-builder.vala
index dc63c6d..a0607fb 100644
--- a/src/libtracker-sparql/tracker-builder.vala
+++ b/src/libtracker-sparql/tracker-builder.vala
@@ -674,6 +674,8 @@ public class Tracker.Sparql.Builder : Object {
 	public void prepend (string raw)
 	{
 		str.prepend ("%s\n".printf (raw));
+
+		length++;
 	}
 
 	/**
@@ -693,6 +695,8 @@ public class Tracker.Sparql.Builder : Object {
 		}
 
 		str.append (raw);
+
+		length++;
 	}
 }