clientRead: keep reading if client not connected but data is available

Author: pennam

src/BearSSLClient.cpp

@@ -509,7 +509,7 @@ int BearSSLClient::clientRead(void *ctx, unsigned char *buf, size_t len)
 {
   Client* c = (Client*)ctx;
 
-  if (!c->connected()) {
+  if (!c->connected() && !c->available()) {
     return -1;
   }