WaE vs2015 truncation of literal on static_cast

Change-Id: I63a89c50c653145ea49aa34e4e4dd554da66598f
Reviewed-on: https://gerrit.libreoffice.org/22597
Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Tested-by: Norbert Thiebaud <nthiebaud@gmail.com>

basic/source/comp/codegen.cxx

@@ -478,7 +478,14 @@ public:
         T result = 0 ;
         static const S max = std::numeric_limits< S >::max();
         result = m_nNumOp0 + ( ( sizeof(S) + 1 ) * m_nNumSingleParams ) + ( (( sizeof(S) * 2 )+ 1 )  * m_nNumDoubleParams );
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning( disable : 4309)
+#endif
         return std::min(static_cast<T>(max), result);
+#ifdef _MSC_VER
+#pragma warning(push)
+#endif
     }
    virtual bool processParams() override { return false; }
 };