[PATCH v2 1/2] user32: Force undefined bits in GetKeyState() and GetKeyboardState() to zero.

[Markus Engel]

Only the highest and lowest bits in the return values of these functions
have a meaning, the others are undefined. While the other bits are
always cleared in Windows, wine stores information there. Some programs
expect these undefined bits to be zero, though, so make sure they are
not set.

This is a slightly adjusted version of the patch by Raditz12 that is
attached to the bug report.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=30814
Signed-off-by: Markus Engel <markus_wine at familie-engel.online>
---
 dlls/user32/input.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/dlls/user32/input.c b/dlls/user32/input.c
index b7cdbd84ef..a5524955e8 100644
--- a/dlls/user32/input.c
+++ b/dlls/user32/input.c
@@ -555,7 +555,7 @@ SHORT WINAPI DECLSPEC_HOTPATCH GetKeyState(INT vkey)
     {
         req->tid = GetCurrentThreadId();
         req->key = vkey;
-        if (!wine_server_call( req )) retval = (signed char)reply->state;
+        if (!wine_server_call( req )) retval = (signed char)(reply->state & ~0x7e);
     }
     SERVER_END_REQ;
     TRACE("key (0x%x) -> %x\n", vkey, retval);
@@ -569,6 +569,7 @@ SHORT WINAPI DECLSPEC_HOTPATCH GetKeyState(INT vkey)
 BOOL WINAPI DECLSPEC_HOTPATCH GetKeyboardState( LPBYTE state )
 {
     BOOL ret;
+    UINT i;
 
     TRACE("(%p)\n", state);
 
@@ -579,6 +580,9 @@ BOOL WINAPI DECLSPEC_HOTPATCH GetKeyboardState( LPBYTE state )
         req->key = -1;
         wine_server_set_reply( req, state, 256 );
         ret = !wine_server_call_err( req );
+
+        for (i = 0; i < 256; i++)
+            state[i] &= ~0x7e;
     }
     SERVER_END_REQ;
     return ret;
-- 
2.26.2