Little fixes and recursive mutex in NzFile

Former-commit-id: 7b5f3a6b14d027dc664e5d220257a22caca25c95

src/Nazara/Core/Posix/ConditionVariableImpl.cpp

@@ -35,7 +35,7 @@ bool NzConditionVariableImpl::Wait(NzMutexImpl* mutex, nzUInt32 timeout)
 {
 	// get the current time
 	timeval tv;
-	gettimeofday(&tv, NULL);
+	gettimeofday(&tv, nullptr);
 
 	// construct the time limit (current time + time to wait)
 	timespec ti;

src/Nazara/Core/Posix/DirectoryImpl.cpp

@@ -82,14 +82,15 @@ bool NzDirectoryImpl::Exists(const NzString& dirPath)
 NzString NzDirectoryImpl::GetCurrent()
 {
 	NzString currentPath;
-	char* path = new char[_PC_PATH_MAX];
+	char* path = getcwd(nullptr, 0);
 
-	if (getcwd(path, _PC_PATH_MAX))
+	if (path)
+	{
 		currentPath = path;
+		free(path);
+	}
 	else
-		NazaraError("Unable to get current directory: " + NzError::GetLastSystemError());
-
-	delete[] path;
+		NazaraError("Unable to get current directory: " + NzError::GetLastSystemError()); // Bug: initialisation -> if no path for log !
 
 	return currentPath;
 }

src/Nazara/Core/Posix/MutexImpl.cpp

@@ -7,7 +7,7 @@
 
 NzMutexImpl::NzMutexImpl()
 {
-	pthread_mutex_init(&m_handle, NULL);
+	pthread_mutex_init(&m_handle, nullptr);
 }
 
 NzMutexImpl::~NzMutexImpl()

src/Nazara/Core/Posix/ThreadImpl.cpp

@@ -57,9 +57,9 @@ void NzThreadImpl::Sleep(nzUInt32 time)
 
     // create a mutex and thread condition
     pthread_mutex_t mutex;
-    pthread_mutex_init(&mutex, 0);
+    pthread_mutex_init(&mutex, nullptr);
     pthread_cond_t condition;
-    pthread_cond_init(&condition, 0);
+    pthread_cond_init(&condition, nullptr);
 
     // wait...
     pthread_mutex_lock(&mutex);