staging: ft1000: Fix compilation warning.

This patch fix following warning:
drivers/staging/ft1000/ft1000-usb/ft1000_usb.c:67:22:
warning: ‘pft1000info’ may be used uninitialized in this function
Signed-off-by: Marek Belisko <marek.belisko@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/ft1000/ft1000-usb/ft1000_usb.c

@@ -64,7 +64,7 @@ static int ft1000_probe(struct usb_interface *interface,
 	int i, ret = 0, size;
 
 	struct ft1000_device *ft1000dev;
-	struct ft1000_info *pft1000info;
+	struct ft1000_info *pft1000info = NULL;
 	const struct firmware *dsp_fw;
 
 	ft1000dev = kmalloc(sizeof(struct ft1000_device), GFP_KERNEL);