wlan: Initialize memory allocated for PNO request.

Use of uninitialized memory space leads to have unexpected/invalid
value to PNO request parameters, causing inconsistency in behavior
of the PNO feature. This commit addresses the issue by initializing
memory allocated for PNO request.

Change-Id: I5e4289ac2b92e3dfdbd3cba54642da1a05c3cc00
CRs-fixed: 550572
diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index 6c93f73..f9783ec 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -7431,6 +7431,7 @@
         return -ENOMEM;
     }
 
+    memset(pPnoRequest, 0, sizeof (tSirPNOScanReq));
     pPnoRequest->enable = 1; /*Enable PNO */
     pPnoRequest->ucNetworksCount = request->n_match_sets;