add console error messages when ZeroMQ sending fails (should never happen actually)

include/DoocsProcessArray.h

@@ -130,7 +130,10 @@ namespace ChimeraTK {
         info.sec = seconds;
         info.usec = microseconds;
         info.ident = _macroPulseNumberSource->accessData(0);
-        this->send(&info);
+        auto ret = this->send(&info);
+        if(ret) {
+          std::cout << "ZeroMQ sending failed!!!" << std::endl;
+        }
       }
     }
 

include/DoocsProcessScalar.h

@@ -95,7 +95,10 @@ namespace ChimeraTK {
         info.sec = seconds;
         info.usec = microseconds;
         info.ident = _macroPulseNumberSource->accessData(0);
-        this->send(&info);
+        auto ret = this->send(&info);
+        if(ret) {
+          std::cout << "ZeroMQ sending failed!!!" << std::endl;
+        }
       }
     }
 

src/DoocsSpectrum.cc

@@ -170,7 +170,10 @@ namespace ChimeraTK {
       else {
         info.ident = 0;
       }
-      this->send(&info);
+      auto ret = this->send(&info);
+      if(ret) {
+        std::cout << "ZeroMQ sending failed!!!" << std::endl;
+      }
     }
   }