fix compile on freeBSD when using clang

note:
* NULL is defined as nullptr.
> Note that the null pointer constant nullptr or any other
value of type std::nullptr_t cannot be converted to a pointer
 with reinterpret_cast: implicit conversion or static_cast
 should be used for this purpose.
ref: https://en.cppreference.com/w/cpp/language/reinterpret_cast

Cgl/src/CglLandP/CglLandPUtils.hpp

@@ -85,7 +85,7 @@ struct Cuts
     /** resize vector.*/
     void resize(unsigned int i)
     {
-        cuts_.resize(i, reinterpret_cast<OsiRowCut *> (NULL));
+        cuts_.resize(i, static_cast<OsiRowCut *> (NULL));
     }
 private:
     /** Stores the number of cuts.*/