coverity#1079187 Uninitialized pointer read

Change-Id: Ie3044bebc7921b0fa98f9a9a01f99ef0f2d05eb8

tools/source/rc/rc.cxx

@@ -25,6 +25,7 @@
 #include <tools/rcid.h>
 
 Resource::Resource( const ResId& rResId )
+    : m_pResMgr(NULL)
 {
     GetRes( rResId.SetRT( RSC_RESOURCE ) );
 }