Cygwin/X: Fix -Wold-style-definition warnings

Fix old-style definition warnings caused by definitions with empty
parameter lists "()", which should be "(void)" to indicate the function
takes no parameters, rather than unspecified parameters

Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>

hw/xwin/InitOutput.c

@@ -1052,7 +1052,7 @@ InitOutput (ScreenInfo *screenInfo, int argc, char *argv[])
  */
 
 static Bool
-winCheckDisplayNumber ()
+winCheckDisplayNumber (void)
 {
   int			nDisp;
   HANDLE		mutex;

hw/xwin/winclipboardinit.c

@@ -59,7 +59,7 @@ extern HWND			g_hwndClipboard;
  */
 
 Bool
-winInitClipboard ()
+winInitClipboard (void)
 {
   ErrorF ("winInitClipboard ()\n");
 
@@ -90,7 +90,7 @@ winInitClipboard ()
  */
 
 HWND
-winClipboardCreateMessagingWindow ()
+winClipboardCreateMessagingWindow (void)
 {
   WNDCLASS			wc;
   HWND				hwnd;

hw/xwin/winconfig.c

@@ -561,7 +561,7 @@ winConfigFiles ()
 }
 #else
 Bool
-winConfigFiles ()
+winConfigFiles (void)
 {
   MessageType from;
 
@@ -578,14 +578,14 @@ winConfigFiles ()
 
 
 Bool
-winConfigOptions ()
+winConfigOptions (void)
 {
   return TRUE;
 }
 
 
 Bool
-winConfigScreens ()
+winConfigScreens (void)
 {
   return TRUE;
 }

hw/xwin/winengine.c

@@ -48,7 +48,7 @@ extern const GUID _IID_IDirectDraw4;
  */
 
 void
-winDetectSupportedEngines ()
+winDetectSupportedEngines (void)
 {
   OSVERSIONINFO		osvi;
 
@@ -285,7 +285,7 @@ winSetEngine (ScreenPtr pScreen)
  */
 
 Bool
-winGetDDProcAddresses ()
+winGetDDProcAddresses (void)
 {
   Bool			fReturn = TRUE;
   

hw/xwin/winkeybd.c

@@ -311,7 +311,7 @@ winInitializeModeKeyStates (void)
  */
 
 void
-winRestoreModeKeyStates ()
+winRestoreModeKeyStates (void)
 {
   DWORD			dwKeyState;
   BOOL			processEvents = TRUE;
@@ -499,7 +499,7 @@ winIsFakeCtrl_L (UINT message, WPARAM wParam, LPARAM lParam)
  */
 
 void
-winKeybdReleaseKeys ()
+winKeybdReleaseKeys (void)
 {
   int				i;
 

hw/xwin/winkeyhook.c

@@ -149,7 +149,7 @@ winKeyboardMessageHookLL (int iCode, WPARAM wParam, LPARAM lParam)
  */
 
 Bool
-winInstallKeyboardHookLL ()
+winInstallKeyboardHookLL (void)
 {
   OSVERSIONINFO		osvi = {0};
   
@@ -186,7 +186,7 @@ winInstallKeyboardHookLL ()
  */
 
 void
-winRemoveKeyboardHookLL ()
+winRemoveKeyboardHookLL (void)
 {
   if (g_hhookKeyboardLL)
     UnhookWindowsHookEx (g_hhookKeyboardLL);

hw/xwin/winmultiwindowwm.c

@@ -1428,7 +1428,7 @@ CheckAnotherWindowManager (Display *pDisplay, DWORD dwScreen)
  */
 
 void
-winDeinitMultiWindowWM ()
+winDeinitMultiWindowWM (void)
 {
   ErrorF ("winDeinitMultiWindowWM - Noting shutdown in progress\n");
   g_shutdown = TRUE;

hw/xwin/winprefs.c

@@ -730,7 +730,7 @@ winIconIsOverride(unsigned hiconIn)
  * Load it into prefs structure for use by other functions
  */
 void
-LoadPreferences ()
+LoadPreferences (void)
 {
   char *home;
   char fname[PATH_MAX+NAME_MAX+2];

hw/xwin/winprefslex.l

@@ -105,7 +105,7 @@ SILENTEXIT		{ return SILENTEXIT; }
  * Run-of-the mill requirement for yacc
  */
 int
-yywrap ()
+yywrap (void)
 {
   return 1;
 }