nexus: Initialize frequency in SupplicantAssociatingEvent constructor

Signed-off-by: San Mehat <san@google.com>
diff --git a/nexus/SupplicantAssociatingEvent.cpp b/nexus/SupplicantAssociatingEvent.cpp
index 00a85b6..c6e9fe3 100644
--- a/nexus/SupplicantAssociatingEvent.cpp
+++ b/nexus/SupplicantAssociatingEvent.cpp
@@ -29,6 +29,7 @@
 
     mBssid = NULL;
     mSsid = NULL;
+    mFreq = -1;
 
     // SSID 'default' 
     // OR