ChannelEndPoint.cpp: fix possible memleak in getUnixPath()

nxcomp/src/ChannelEndPoint.cpp

@@ -207,7 +207,10 @@ ChannelEndPoint::getPort(long *port) const {
 bool
 ChannelEndPoint::getUnixPath(char **unixPath) const {
 
-  if (unixPath) *unixPath = NULL;
+  if (unixPath)
+    *unixPath = NULL;
+  else
+    return false;
 
   long p;
   char *path = NULL;
@@ -227,7 +230,6 @@ ChannelEndPoint::getUnixPath(char **unixPath) const {
       return false;
   }
 
-  if (unixPath)
   *unixPath = strdup(path);
 
   return true;

nxcomp/src/Loop.cpp

@@ -6661,6 +6661,7 @@ int ConnectToRemote(ChannelEndPoint &socketAddress)
           << "'.\n" << std::flush;
 
     SAFE_FREE(hostName);
+    SAFE_FREE(unixPath);
 
     if (socketAddress.getUnixPath(&unixPath))
       result = PrepareProxyConnectionUnix(&unixPath, &connectTimeout, &pFD, &reason);

nxcomp/src/Proxy.cpp

@@ -6123,7 +6123,7 @@ int Proxy::handleNewSlaveConnection(int clientFd)
 int Proxy::handleNewGenericConnectionFromProxy(int channelId, T_channel_type type,
                                                ChannelEndPoint &endPoint, const char *label)
 {
-  char *unixPath, *host = NULL;
+  char *unixPath = NULL, *host = NULL;
   long port;
 
   if (endPoint.getUnixPath(&unixPath)) {