configure: Fix typo in gtk-sharp M4 macro when checking for gtk-sharp
configure: Fix typo in gtk-sharp M4 macro when checking for gtk-sharp

babycaseny/banshee,Carbenium/banshee,babycaseny/banshee,stsundermann/banshee,stsundermann/banshee,GNOME/banshee,arfbtwn/banshee,arfbtwn/banshee,babycaseny/banshee,ixfalia/banshee,GNOME/banshee,ixfalia/banshee,stsundermann/banshee,GNOME/banshee,babycaseny/banshee,arfbtwn/banshee,dufoli/banshee,stsundermann/banshee,ixfalia/banshee,ixfalia/banshee,arfbtwn/banshee,Carbenium/banshee,ixfalia/banshee,Carbenium/banshee,dufoli/banshee,GNOME/banshee,arfbtwn/banshee,dufoli/banshee,dufoli/banshee,Carbenium/banshee,arfbtwn/banshee,stsundermann/banshee,GNOME/banshee,stsundermann/banshee,ixfalia/banshee,stsundermann/banshee,ixfalia/banshee,Carbenium/banshee,stsundermann/banshee,GNOME/banshee,dufoli/banshee,dufoli/banshee,dufoli/banshee,arfbtwn/banshee,GNOME/banshee,ixfalia/banshee,dufoli/banshee,arfbtwn/banshee,babycaseny/banshee,GNOME/banshee,babycaseny/banshee,babycaseny/banshee,Carbenium/banshee,babycaseny/banshee