Fix gcc 4.0 -Wpointer-sign warnings.

dlls/mshtml/main.c

@@ -127,7 +127,7 @@ BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpv)
 typedef HRESULT (*CreateInstanceFunc)(IUnknown*,REFIID,void**);
 typedef struct {
     const IClassFactoryVtbl *lpVtbl;
-    ULONG ref;
+    LONG ref;
     CreateInstanceFunc fnCreateInstance;
 } ClassFactory;
 

dlls/mshtml/mshtml_private.h

@@ -29,7 +29,7 @@ typedef struct {
     const IOleInPlaceObjectWindowlessVtbl *lpOleInPlaceObjectWindowlessVtbl;
     const IServiceProviderVtbl            *lpServiceProviderVtbl;
 
-    ULONG ref;
+    LONG ref;
 
     IOleClientSite *client;
     IOleInPlaceSite *ipsite;

dlls/mshtml/protocol.c

@@ -130,7 +130,7 @@ static HRESULT WINAPI ClassFactory_LockServer(IClassFactory *iface, BOOL dolock)
 
 typedef struct {
     const IInternetProtocolVtbl *lpInternetProtocolVtbl;
-    ULONG ref;
+    LONG ref;
 } AboutProtocol;
 
 static HRESULT WINAPI AboutProtocol_QueryInterface(IInternetProtocol *iface, REFIID riid, void **ppv)
@@ -355,7 +355,7 @@ static ProtocolFactory AboutProtocolFactory = {
 
 typedef struct {
     const IInternetProtocolVtbl *lpInternetProtocolVtbl;
-    ULONG ref;
+    LONG ref;
 
     BYTE *data;
     ULONG data_len;