Added some 16 bit entry points needed by multimedia DLLs.

dlls/kernel/kernel32.spec

@@ -948,6 +948,8 @@ debug_channels (comm debugstr dll int resource stress thunk toolhelp win32)
 @ stdcall GetDOSEnvironment16() GetDOSEnvironment16
 @ stdcall GetModuleFileName16(long ptr long) GetModuleFileName16
 @ stdcall GetModuleHandle16(str) GetModuleHandle16
+@ stdcall IsTask16(long) IsTask16
+@ stdcall LoadModule16(str long) LoadModule16
 @ stdcall LoadResource16(long long) LoadResource16
 @ stdcall LockResource16(long) LockResource16
 @ stdcall WinExec16(str long) WinExec16

dlls/user/user32.spec

@@ -353,7 +353,7 @@ debug_channels (accel caret class clipboard combo cursor dc ddeml dialog driver
 @ stdcall IsCharUpperW(long) IsCharUpperW
 @ stdcall IsChild(long long) IsChild
 @ stdcall IsClipboardFormatAvailable(long) IsClipboardFormatAvailable
-@ stub IsDialogMessage
+@ stdcall IsDialogMessage(long ptr) IsDialogMessageA
 @ stdcall IsDialogMessageA(long ptr) IsDialogMessageA
 @ stdcall IsDialogMessageW(long ptr) IsDialogMessageW
 @ stdcall IsDlgButtonChecked(long long) IsDlgButtonChecked
@@ -658,9 +658,16 @@ debug_channels (accel caret class clipboard combo cursor dc ddeml dialog driver
 #
 @ stdcall CallNextHookEx16(long long long long) CallNextHookEx16
 @ stdcall CallWindowProc16(long long long long long) CallWindowProc16
+@ stdcall CloseDriver16(long long long) CloseDriver16
 @ stdcall CreateDialogIndirectParam16(long ptr long long long) CreateDialogIndirectParam16
+@ stdcall DefDriverProc16(long long long long long) DefDriverProc16
 @ stdcall DialogBoxIndirectParam16(long long long long long) DialogBoxIndirectParam16
+@ stdcall GetDriverModuleHandle16(long) GetDriverModuleHandle16
+@ stdcall OpenDriver16(str str long) OpenDriver16
+@ stdcall PostAppMessage16(long long long long) PostAppMessage16
+@ stdcall SendDriverMessage16(long long long long) SendDriverMessage16
 @ stdcall SetWindowsHookEx16(long long long long) SetWindowsHookEx16
+@ stdcall UserYield16() UserYield16
 
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 # Wine extensions: extra useful functions not exported under Windows