Allow ToAscii/ToUnicode work with scanCode = 0

[Dmitry Timoshkov]

Hello.

This is almost the same patch, which was posted to a news group,
but with added TRACE's. It solves a problem with Lightwave, which
does GetKeyboardState() + ToAscii(VK_?, 0, ...) on each WM_KEYDOWN
message. Current code just ignores calls to ToAscii/ToUnicode if
scanCode is 0. I'm not sure, but probably we should add a check
for VK_MENU in lpKeyState and return 0 in that case?

Patch also removes computing of AltGrMask, since we save and restore
it on each key press event in any case.

Changelog:
    Dmitry Timoshkov <dmitry at codeweavers.com>
    Allow ToAscii/ToUnicode work with scanCode = 0.

--- cvs/hq/wine/windows/x11drv/keyboard.c	Sat Nov 24 17:54:14 2001
+++ wine/windows/x11drv/keyboard.c	Sat Feb  9 20:41:26 2002
@@ -997,12 +997,7 @@
 		int k;
                 
 		for (k = 0; k < keysyms_per_keycode; k += 1)
-                    if (TSXKeycodeToKeysym(display, *kcp, k) == XK_Mode_switch)
-		    {
-                        AltGrMask = 1 << i;
-                        TRACE_(key)("AltGrMask is %x\n", AltGrMask);
-		    }
-                    else if (TSXKeycodeToKeysym(display, *kcp, k) == XK_Num_Lock)
+                    if (TSXKeycodeToKeysym(display, *kcp, k) == XK_Num_Lock)
 		    {
                         NumLockMask = 1 << i;
                         TRACE_(key)("NumLockMask is %x\n", NumLockMask);
@@ -1506,12 +1501,6 @@
     int keyc;
     BYTE lpChar[2];
 
-    if (scanCode==0) {
-        /* This happens when doing Alt+letter : a fake 'down arrow' key press
-           event is generated by windows. Just ignore it. */
-        TRACE("scanCode=0, doing nothing\n");
-        return 0;
-    }
     if (scanCode & 0x8000)
     {
         TRACE("Key UP, doing nothing\n" );
@@ -1521,15 +1510,28 @@
     e.keycode = 0;
     e.state = 0;
     if (lpKeyState[VK_SHIFT] & 0x80)
+    {
+	TRACE("ShiftMask = %04x\n", ShiftMask);
 	e.state |= ShiftMask;
+    }
     if (lpKeyState[VK_CAPITAL] & 0x01)
+    {
+	TRACE("LockMask = %04x\n", LockMask);
 	e.state |= LockMask;
+    }
     if (lpKeyState[VK_CONTROL] & 0x80)
+    {
+	TRACE("ControlMask = %04x\n", ControlMask);
 	e.state |= ControlMask;
+    }
     if (lpKeyState[VK_NUMLOCK] & 0x01)
+    {
+	TRACE("NumLockMask = %04x\n", NumLockMask);
 	e.state |= NumLockMask;
+    }
 
     /* Restore saved AltGr state */
+    TRACE("AltGrMask = %04x\n", AltGrMask);
     e.state |= AltGrMask;
 
     TRACE_(key)("(%04X, %04X) : faked state = %X\n",