toHTML won't add empty wtx.mapValue elements

As the code was before, toHTML added empty elements to mapValue to check for their existance. Now first it check for their existance and then for their non-emptiness.

Removed a duplicated identical if

There are two equal ifs, one inside another. If the first one is true, then the second one is true.

src/qt/transactiondesc.cpp

@@ -64,11 +64,10 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
         {
             strHTML += "<b>" + tr("Source") + ":</b> " + tr("Generated") + "<br>";
         }
-        else if (!wtx.mapValue["from"].empty())
+        else if (wtx.mapValue.count("from") && !wtx.mapValue["from"].empty())
         {
             // Online transaction
-            if (!wtx.mapValue["from"].empty())
-                strHTML += "<b>" + tr("From") + ":</b> " + GUIUtil::HtmlEscape(wtx.mapValue["from"]) + "<br>";
+            strHTML += "<b>" + tr("From") + ":</b> " + GUIUtil::HtmlEscape(wtx.mapValue["from"]) + "<br>";
         }
         else
         {
@@ -104,7 +103,7 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
         //
         // To
         //
-        if (!wtx.mapValue["to"].empty())
+        if (wtx.mapValue.count("to") && !wtx.mapValue["to"].empty())
         {
             // Online transaction
             std::string strAddress = wtx.mapValue["to"];
@@ -160,7 +159,7 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
                     if (wallet->IsMine(txout))
                         continue;
 
-                    if (wtx.mapValue["to"].empty())
+                    if (!wtx.mapValue.count("to") || wtx.mapValue["to"].empty())
                     {
                         // Offline transaction
                         CTxDestination address;
@@ -209,9 +208,9 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
         //
         // Message
         //
-        if (!wtx.mapValue["message"].empty())
+        if (wtx.mapValue.count("message") && !wtx.mapValue["message"].empty())
             strHTML += "<br><b>" + tr("Message") + ":</b><br>" + GUIUtil::HtmlEscape(wtx.mapValue["message"], true) + "<br>";
-        if (!wtx.mapValue["comment"].empty())
+        if (wtx.mapValue.count("comment") && !wtx.mapValue["comment"].empty())
             strHTML += "<br><b>" + tr("Comment") + ":</b><br>" + GUIUtil::HtmlEscape(wtx.mapValue["comment"], true) + "<br>";
 
         strHTML += "<b>" + tr("Transaction ID") + ":</b> " + wtx.GetHash().ToString().c_str() + "<br>";