reduce the 'Returnvalue has wrong Type' log spam

if there was no result found don't misleadingly warn that it's of the
wrong type

Change-Id: I647c847e68a6ac7ca93f7fc860a8e376acce06e1
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/189853
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>
Tested-by: Jenkins

sd/source/core/stlsheet.cxx

@@ -1182,7 +1182,7 @@ css::uno::Any SdStyleSheet::getPropertyValue_Impl(const OUString& PropertyName)
         }
         else
         {
-            OSL_FAIL("SvxShape::GetAnyForItem() Returnvalue has wrong Type!" );
+            SAL_WARN_IF(aAny.hasValue(), "sd", "SvxShape::GetAnyForItem() Returnvalue has wrong Type!");
         }
     }