[SCSI] qla2xxx: Fix "active_mask" may be used uninitialized warning.

Since active_mask is first assigned in an "else" block, the compiler throws
a warning saying that the active_mask variable may be used uninitialized in
a print statement later.  Initialize active_mask to 0 in the declaration to
stop the warning.
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/qla2xxx/qla_nx.c

@@ -3539,7 +3539,8 @@ qla82xx_dev_failed_handler(scsi_qla_host_t *vha)
 static void
 qla82xx_need_reset_handler(scsi_qla_host_t *vha)
 {
-	uint32_t dev_state, drv_state, drv_active, active_mask;
+	uint32_t dev_state, drv_state, drv_active;
+	uint32_t active_mask = 0;
 	unsigned long reset_timeout;
 	struct qla_hw_data *ha = vha->hw;
 	struct req_que *req = ha->req_q_map[0];