Please valgrind by not accessing uninitialized memory

Fix access or uninitialized memory. It is safe in this case, but causes
valgrind's memcheck to complain unnecessarily.

Change-Id: I01ad09d282b07f7099ad6bed85f4327b3c7c677f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/network/ssl/qsslkey_p.h

@@ -61,9 +61,10 @@ class QSslKeyPrivate
 {
 public:
     inline QSslKeyPrivate()
-        : opaque(0)
+        : algorithm(QSsl::Opaque)
+        , opaque(0)
     {
-        clear();
+        clear(false);
     }
 
     inline ~QSslKeyPrivate()