Fixed bug, -j option produced duplicate error messages.

src/threadexecutor.cpp

@@ -71,7 +71,14 @@ bool ThreadExecutor::handleRead(unsigned int &result)
     {
         ErrorLogger::ErrorMessage msg;
         msg.deserialize(buf);
-        _errorLogger.reportErr(msg);
+
+        // Alert only about unique errors
+        std::string errmsg = msg.toText();
+        if (std::find(_errorList.begin(), _errorList.end(), errmsg) == _errorList.end())
+        {
+            _errorList.push_back(errmsg);
+            _errorLogger.reportErr(msg);
+        }
     }
     else if (type == '3')
     {

src/threadexecutor.h

@@ -22,6 +22,7 @@
 
 #include <vector>
 #include <string>
+#include <list>
 #include "settings.h"
 #include "errorlogger.h"
 
@@ -50,6 +51,7 @@ private:
     bool handleRead(unsigned int &result);
     void writeToPipe(char type, const std::string &data);
     int _pipe[2];
+    std::list<std::string> _errorList;
 public:
     /**
      * @return true if support for threads exist.