another debian packaging fix: add libqt4-opengl-dev build-dep

Author: jef-n

debian/control.sid

@@ -16,6 +16,7 @@ Build-Depends:
  libpq-dev,
  libproj-dev,
  libqt4-dev (>=4.4.0),
+ libqt4-opengl-dev,
  libqtwebkit-dev,
  libqwt-dev,
  libspatialite-dev,