kernel32: Do not omit mandatory argument for VirtualProtect.

dlls/kernel32/except.c

@@ -401,6 +401,7 @@ static BOOL start_debugger_atomic(PEXCEPTION_POINTERS epointers)
  */
 static inline BOOL check_resource_write( void *addr )
 {
+    DWORD old_prot;
     void *rsrc;
     DWORD size;
     MEMORY_BASIC_INFORMATION info;
@@ -412,7 +413,7 @@ static inline BOOL check_resource_write( void *addr )
         return FALSE;
     if (addr < rsrc || (char *)addr >= (char *)rsrc + size) return FALSE;
     TRACE( "Broken app is writing to the resource data, enabling work-around\n" );
-    VirtualProtect( rsrc, size, PAGE_READWRITE, NULL );
+    VirtualProtect( rsrc, size, PAGE_READWRITE, &old_prot );
     return TRUE;
 }