QCryptographicHash: move result.clear() to beginning of reset()

... from the end().

It was lonely down there, and prone to be overlooked when performing
early returns in the #ifdef'ery above, as witnessed by the early
returns in the OpenSSL3 code.

Amends 1fe74c3bd3, itself amending
633c136596.

Pick-to: 6.5
Change-Id: I8c941ecb5c4755d8823b2161544cf6f7fe75a239
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/tools/qcryptographichash.cpp

@@ -464,6 +464,7 @@ QCryptographicHash::Algorithm QCryptographicHash::algorithm() const noexcept
 
 void QCryptographicHashPrivate::reset() noexcept
 {
+    result.clear();
 #ifdef USING_OPENSSL30
     if (method == QCryptographicHash::Blake2b_160 ||
         method == QCryptographicHash::Blake2b_256 ||
@@ -573,7 +574,6 @@ void QCryptographicHashPrivate::reset() noexcept
 #endif
     }
 #endif // !QT_CONFIG(opensslv30)
-    result.clear();
 }
 
 #if QT_DEPRECATED_SINCE(6, 4)