ntdll/tests: Fix atom tests on Win7.

dlls/ntdll/tests/Makefile.in

@@ -3,7 +3,7 @@ TOPOBJDIR = ../../..
 SRCDIR    = @srcdir@
 VPATH     = @srcdir@
 TESTDLL   = ntdll.dll
-IMPORTS   = kernel32
+IMPORTS   = user32 kernel32
 
 CTESTS = \
 	atom.c \

dlls/ntdll/tests/atom.c

@@ -34,6 +34,7 @@
 #include "winbase.h"
 #include "winreg.h"
 #include "winnls.h"
+#include "winuser.h"
 #include "wine/test.h"
 #include "winternl.h"
 
@@ -478,6 +479,10 @@ START_TEST(atom)
     InitFunctionPtr();
     if (pRtlCreateAtomTable)
     {
+        /* Global atom table seems to be available to GUI apps only in
+           Win7, so let's turn this app into a GUI app */
+        GetDesktopWindow();
+
         test_NtAtom();
         test_NtIntAtom();
         test_NtRefPinAtom();