Try to fix access violation exception

Author: caesay

msi-interop/handle_table.c

@@ -1,6 +1,7 @@
 #include "handle_table.h"
 #include <glib.h>
 #include <gsf/gsf-utils.h>
+#include "libmsi.h"
 
 typedef struct {
     GObject *obj;
@@ -247,5 +248,9 @@ static void
 handle_table_auto_init(void)
 {
     gsf_init();
+    g_type_ensure(libmsi_database_get_type());
+    g_type_ensure(libmsi_query_get_type());
+    g_type_ensure(libmsi_record_get_type());
+    g_type_ensure(libmsi_summary_info_get_type());
     handle_table_init();
 }

msi-interop/query.c

@@ -164,6 +164,11 @@ UINT WINAPI MsiViewFetch(MSIHANDLE hView, MSIHANDLE *phRecord)
     if (!query)
         return ERROR_INVALID_HANDLE;
 
+    if (!query->view || !query->view->ops || !query->database) {
+        g_object_unref(query);
+        return ERROR_FUNCTION_FAILED;
+    }
+
     GError *error = NULL;
     LibmsiRecord *rec = libmsi_query_fetch(query, &error);
     g_object_unref(query);

msi-interop/string_utils.h

@@ -4,7 +4,9 @@
 #include <stddef.h>
 #include "msi_interop.h"
 
+#ifndef _WIN32
 typedef unsigned short WCHAR;
+#endif
 
 char *utf16_to_utf8(const WCHAR *utf16);