Check for failed allocations. Spotted by Martin Bealby.

Modified: trunk/reactos/lib/user32/misc/winhelp.c

--- trunk/reactos/lib/user32/misc/winhelp.c	2005-12-12 20:46:26 UTC (rev 20117)
+++ trunk/reactos/lib/user32/misc/winhelp.c	2005-12-12 20:49:35 UTC (rev 20118)
@@ -107,6 +107,8 @@

 		nlen = 0;
 	size = sizeof(WINHELP) + nlen + dsize;
 	hwh = GlobalAlloc(0,size);

+	if (hwh == NULL)
+		return FALSE;

 	lpwh = GlobalLock(hwh);
 	lpwh->size = size;
 	lpwh->command = uCommand;