osgeo4w: set GDAL_DRIVER_PATH again (GDAL looks in apps/qgis/bin/gdalplugins otherwise)

Author: jef-n

ms-windows/osgeo4w/qgis.bat.tmpl

@@ -4,5 +4,6 @@ SET OSGEO4W_ROOT=@osgeo4w@
 call "%OSGEO4W_ROOT%"\bin\o4w_env.bat
 call "%OSGEO4W_ROOT%"\apps\grass\grass-@grassversion@\etc\env.bat
 @echo off
+set GDAL_DRIVER_PATH=%OSGEO4W_ROOT%\bin\gdalplugins\1.9;OSGEO4W_ROOT%\bin\gdalplugins
 path %PATH%;%OSGEO4W_ROOT%\apps\@package@\bin;%OSGEO4W_ROOT%\apps\grass\grass-@grassversion@\lib
 start "Quantum GIS" /B "%OSGEO4W_ROOT%"\apps\@package@\bin\qgis.exe %*