Fix leaky heap allocated objects

Author: sebromero

src/ArduinoCellular.cpp

@@ -166,20 +166,23 @@ int ArduinoCellular::getSignalQuality(){
 }
 
 TinyGsmClient ArduinoCellular::getNetworkClient(){
-    return TinyGsmClient(modem);
+    return TinyGsmClient(modem, 0);
 }
 
 HttpClient ArduinoCellular::getHTTPClient(const char * server, const int port){
-    return HttpClient(* new TinyGsmClient(modem), server, port);
+    TinyGsmClient client = getNetworkClient();
+    return HttpClient(client, server, port);
 }
 
 #if defined(ARDUINO_CELLULAR_BEARSSL)
 HttpClient ArduinoCellular::getHTTPSClient(const char * server, const int port){
-    return HttpClient(* new BearSSLClient(* new TinyGsmClient(modem)), server, port);
+    BearSSLClient client = getSecureNetworkClient();
+    return HttpClient(client, server, port);
 }
 
 BearSSLClient ArduinoCellular::getSecureNetworkClient(){
-    return BearSSLClient(* new TinyGsmClient(modem));
+    TinyGsmClient client = getNetworkClient();
+    return BearSSLClient(client);
 }
 #endif