express: enable WeakPointerToBase comparison operators on Win32

I'm not sure why they were ifdeffed out, but they should certainly be available so that it is possible to compare WeakPointerTo in a thread-safe manner.

panda/src/express/weakPointerToBase.I

@@ -202,7 +202,6 @@ update_type(To *ptr) {
 }
 
 #ifndef CPPPARSER
-#ifndef WIN32_VC
 /**
  *
  */
@@ -426,7 +425,6 @@ INLINE bool WeakPointerToBase<T>::
 operator >= (const PointerToBase<To> &other) const {
   return (To *)_void_ptr >= (To *)((WeakPointerToBase<To> *)&other)->_void_ptr;
 }
-#endif  // WIN32_VC
 
 /**
  *

panda/src/express/weakPointerToBase.h

@@ -48,7 +48,6 @@ public:
   // These comparison functions are common to all things PointerTo, so they're
   // defined up here.
 #ifndef CPPPARSER
-#ifndef WIN32_VC
   INLINE bool operator == (const To *other) const;
   INLINE bool operator != (const To *other) const;
   INLINE bool operator > (const To *other) const;
@@ -77,7 +76,7 @@ public:
   INLINE bool operator > (const PointerToBase<To> &other) const;
   INLINE bool operator <= (const PointerToBase<To> &other) const;
   INLINE bool operator >= (const PointerToBase<To> &other) const;
-#endif  // WIN32_VC
+
   INLINE bool operator < (const To *other) const;
   INLINE bool operator < (std::nullptr_t) const;
   INLINE bool operator < (const WeakPointerToBase<To> &other) const;