user32: Set the edit text in a combobox only if combobox has strings

[Dmitry Timoshkov]

Hello,

this patch fixes a problem reported in the bug 10816.

Changelog:
    user32: Set the edit text in a combobox only if combobox has strings.
---
 dlls/user32/combo.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/dlls/user32/combo.c b/dlls/user32/combo.c
index b846618..6f0fd84 100644
--- a/dlls/user32/combo.c
+++ b/dlls/user32/combo.c
@@ -1030,9 +1030,12 @@ static void CBUpdateEdit( LPHEADCOMBO lphc , INT index )
        }
    }
 
-   lphc->wState |= (CBF_NOEDITNOTIFY | CBF_NOLBSELECT);
-   SendMessageW(lphc->hWndEdit, WM_SETTEXT, 0, pText ? (LPARAM)pText : (LPARAM)empty_stringW);
-   lphc->wState &= ~(CBF_NOEDITNOTIFY | CBF_NOLBSELECT);
+   if( CB_HASSTRINGS(lphc) )
+   {
+      lphc->wState |= (CBF_NOEDITNOTIFY | CBF_NOLBSELECT);
+      SendMessageW(lphc->hWndEdit, WM_SETTEXT, 0, pText ? (LPARAM)pText : (LPARAM)empty_stringW);
+      lphc->wState &= ~(CBF_NOEDITNOTIFY | CBF_NOLBSELECT);
+   }
 
    if( lphc->wState & CBF_FOCUSED )
       SendMessageW(lphc->hWndEdit, EM_SETSEL, 0, (LPARAM)(-1));
-- 
1.5.3.7