Fixed cppcheck errors in ftplib.cpp. This solves #3.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit d08b667172)

src/ftplib.cpp

@@ -756,6 +756,7 @@ int ftplib::FtpOpenPort(netbuf *nControl, netbuf **nData, int mode, int dir, cha
 	{
 		FtpClose(*nData);
 		*nData = NULL;
+		free(ctrl);
 		return -1;
 	}
 
@@ -851,9 +852,10 @@ int ftplib::FtpOpenPasv(netbuf *nControl, netbuf **nData, int mode, int dir, cha
 	}
 
 	if (nControl->dir != FTPLIB_CONTROL) return -1;
-	sprintf(cmd,"%s\r\n",cmd);
-	if (nControl->tlsctrl) ret = SSL_write(nControl->ssl,cmd,strlen(cmd));
-	else ret = write(nControl->handle,cmd,strlen(cmd));
+	char buf[256];
+	sprintf(buf,"%s\r\n",cmd);
+	if (nControl->tlsctrl) ret = SSL_write(nControl->ssl,buf,strlen(buf));
+	else ret = write(nControl->handle,buf,strlen(buf));
 	if (ret <= 0)
 	{
 		perror("write");