user32: Make sure the desktop window is created before caps enumeration.

[Dmitry Timoshkov]

This patch fixes the problem reported in the bug 21709.
---
 dlls/user32/sysparams.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/dlls/user32/sysparams.c b/dlls/user32/sysparams.c
index e6d2386..7ac806f 100644
--- a/dlls/user32/sysparams.c
+++ b/dlls/user32/sysparams.c
@@ -2639,8 +2639,12 @@ INT WINAPI GetSystemMetrics( INT index )
     switch (index)
     {
     case SM_CXSCREEN:
+        /* make sure the desktop window is created before caps enumeration */
+        GetDesktopWindow();
         return GetDeviceCaps( get_display_dc(), HORZRES );
     case SM_CYSCREEN:
+        /* make sure the desktop window is created before caps enumeration */
+        GetDesktopWindow();
         return GetDeviceCaps( get_display_dc(), VERTRES );
     case SM_CXVSCROLL:
         if (!spi_loaded[SPI_NONCLIENTMETRICS_IDX]) load_nonclient_metrics();
-- 
1.7.0.6