don't use annoying and unneeded in C++ casts of NULL to "T *" in all other files neither

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58227 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/dialup.cpp

@@ -721,8 +721,8 @@ wxDialUpManagerImpl::CheckIfconfig()
 
 #if defined(__SOLARIS__) || defined (__SUNOS__)
                     // dialup device under SunOS/Solaris
-                    hasModem = strstr(output.fn_str(),"ipdptp") != (char *)NULL;
-                    hasLAN = strstr(output.fn_str(), "hme") != (char *)NULL;
+                    hasModem = strstr(output.fn_str(),"ipdptp") != NULL;
+                    hasLAN = strstr(output.fn_str(), "hme") != NULL;
 #elif defined(__LINUX__) || defined (__FREEBSD__)
                     hasModem = strstr(output.fn_str(),"ppp")    // ppp
                         || strstr(output.fn_str(),"sl")  // slip

src/unix/dir.cpp

@@ -115,7 +115,7 @@ wxDirData::~wxDirData()
 
 bool wxDirData::Read(wxString *filename)
 {
-    dirent *de = (dirent *)NULL;    // just to silence compiler warnings
+    dirent *de = NULL;    // just to silence compiler warnings
     bool matches = false;
 
     // speed up string concatenation in the loop a bit

src/unix/fontutil.cpp

@@ -370,7 +370,7 @@ wxString wxNativeFontInfo::ToUserString() const
 // private data
 // ----------------------------------------------------------------------------
 
-static wxHashTable *g_fontHash = (wxHashTable*) NULL;
+static wxHashTable *g_fontHash = NULL;
 
 // ----------------------------------------------------------------------------
 // private functions
@@ -1407,7 +1407,7 @@ void wxFontModule::OnExit()
 {
     delete g_fontHash;
 
-    g_fontHash = (wxHashTable *)NULL;
+    g_fontHash = NULL;
 }
 
 #endif // GTK 2.0/1.x

src/unix/sound_sdl.cpp

@@ -53,7 +53,7 @@ wxDECLARE_LOCAL_EVENT( wxEVT_SOUND_BACKEND_SDL_NOTIFICATION, wxSoundBackendSDLNo
                               -1,                       \
                               -1,                       \
                               wxEVENT_HANDLER_CAST( wxSoundBackendSDLNotificationFunction, func ), \
-                              (wxObject *) NULL ),
+                              NULL ),
 
 IMPLEMENT_DYNAMIC_CLASS(wxSoundBackendSDLNotification, wxEvtHandler)
 wxDEFINE_EVENT( wxEVT_SOUND_BACKEND_SDL_NOTIFICATION, wxSoundBackendSDLNotification )

src/unix/threadpsx.cpp

@@ -128,11 +128,11 @@ static pthread_key_t gs_keySelf;
 static size_t gs_nThreadsBeingDeleted = 0;
 
 // a mutex to protect gs_nThreadsBeingDeleted
-static wxMutex *gs_mutexDeleteThread = (wxMutex *)NULL;
+static wxMutex *gs_mutexDeleteThread = NULL;
 
 // and a condition variable which will be signaled when all
 // gs_nThreadsBeingDeleted will have been deleted
-static wxCondition *gs_condAllDeleted = (wxCondition *)NULL;
+static wxCondition *gs_condAllDeleted = NULL;
 
 // this mutex must be acquired before any call to a GUI function
 // (it's not inside #if wxUSE_GUI because this file is compiled as part

src/unix/utilsunx.cpp

@@ -202,7 +202,7 @@ void wxMicroSleep(unsigned long microseconds)
     tmReq.tv_nsec = (microseconds % 1000000) * 1000;
 
     // we're not interested in remaining time nor in return value
-    (void)nanosleep(&tmReq, (timespec *)NULL);
+    (void)nanosleep(&tmReq, NULL);
 #elif defined(HAVE_USLEEP)
     // uncomment this if you feel brave or if you are sure that your version
     // of Solaris has a safe usleep() function but please notice that usleep()