msm: camera: isp: Change local variable from uint32_t to int

Change the local variable num_wm from uint32_t to int so that
the error from cam_vfe_bus_get_num_wm() is correctly caught.

Change-Id: Ia03002bb199af49a60d818950b904c313367f93b
Signed-off-by: Harsh Shah <harshs@codeaurora.org>
diff --git a/drivers/media/platform/msm/camera/cam_isp/isp_hw_mgr/isp_hw/vfe_hw/vfe_bus/cam_vfe_bus_ver2.c b/drivers/media/platform/msm/camera/cam_isp/isp_hw_mgr/isp_hw/vfe_hw/vfe_bus/cam_vfe_bus_ver2.c
index 1115112..af03312 100644
--- a/drivers/media/platform/msm/camera/cam_isp/isp_hw_mgr/isp_hw/vfe_hw/vfe_bus/cam_vfe_bus_ver2.c
+++ b/drivers/media/platform/msm/camera/cam_isp/isp_hw_mgr/isp_hw/vfe_hw/vfe_bus/cam_vfe_bus_ver2.c
@@ -1697,7 +1697,7 @@
 	int                                     i;
 	enum cam_vfe_bus_ver2_vfe_out_type      vfe_out_res_id;
 	uint32_t                                format;
-	uint32_t                                num_wm;
+	int                                     num_wm;
 	uint32_t                                subscribe_irq;
 	uint32_t                                client_done_mask;
 	struct cam_vfe_bus_ver2_priv           *ver2_bus_priv = bus_priv;