qcacld-3.0: Fix pointer dereference condition

In the APi wlansap_roam_callback, under switch
case of roam result eCSR_ROAM_RESULT_INFRA_ASSOCIATION_IND,
the driver passes csr_roam_info in
wlansap_roam_process_infra_assoc_ind without a NULL check for
the same, which may cause pointer dereference.

Fix is to call wlansap_roam_process_infra_assoc_ind only if
csr_roam_info is valid

Change-Id: I6388b7c8f7af827a5c2a862779f04b22c5c5f23e
CRs-Fixed: 2260094

core/sap/src/sap_api_link_cntl.c

@@ -1124,7 +1124,9 @@ wlansap_roam_callback(void *ctx, struct csr_roam_info *csr_roam_info,
 
 	switch (roam_result) {
 	case eCSR_ROAM_RESULT_INFRA_ASSOCIATION_IND:
-		wlansap_roam_process_infra_assoc_ind(sap_ctx, roam_result,
+		if (csr_roam_info)
+			wlansap_roam_process_infra_assoc_ind(sap_ctx,
+						roam_result,
 						csr_roam_info, &qdf_ret_status);
 		break;
 	case eCSR_ROAM_RESULT_INFRA_ASSOCIATION_CNF: