Hi, I've uploaded an nmu fixing this issue. Please see attached.
Best wishes,
Mike
diff -Nru gstreamer1.0-1.4.3/debian/changelog gstreamer1.0-1.4.3/debian/changelog
--- gstreamer1.0-1.4.3/debian/changelog 2014-09-24 05:06:00.000000000 -0400
+++ gstreamer1.0-1.4.3/debian/changelog 2014-11-02 00:28:51.000000000 -0400
@@ -1,3 +1,10 @@
+gstreamer1.0 (1.4.3-1.1) unstable; urgency=medium
+
+ * Non-maintainer upload.
+ * Add missing libgstreamer dependency to the gir package (closes: #761019).
+
+ -- Michael Gilbert <mgilb...@debian.org> Sun, 02 Nov 2014 04:02:20 +0000
+
gstreamer1.0 (1.4.3-1) unstable; urgency=medium
* New upstream bugfix release.
diff -Nru gstreamer1.0-1.4.3/debian/control gstreamer1.0-1.4.3/debian/control
--- gstreamer1.0-1.4.3/debian/control 2014-06-28 05:14:41.000000000 -0400
+++ gstreamer1.0-1.4.3/debian/control 2014-11-02 00:28:38.000000000 -0400
@@ -147,7 +147,7 @@
Section: introspection
Architecture: any
Depends: ${gir:Depends},
- ${shlibs:Depends},
+ libgstreamer1.0-0,
${misc:Depends},
${gir:Depends}
Description: Description: GObject introspection data for the GStreamer library
