[FEATURE] In report_to_json: do not output empty dump report, unless specifically requested

include/pe_sieve_types.h

@@ -81,10 +81,10 @@ namespace pesieve {
 	} t_json_level;
 
 	typedef enum {
-		REPORT_NONE = 0,
-		REPORT_SCANNED,
-		REPORT_DUMPED,
-		REPORT_ALL
+		REPORT_NONE = 0,     ///< do not output a report
+		REPORT_SCANNED,	     ///< output the scan report
+		REPORT_DUMPED,	     ///< output the dumps report
+		REPORT_ALL           ///< output all available reports
 	} t_report_type;
 
 	//!  A wrapper for a dynamically allocated string.

postprocessors/report_formatter.cpp

@@ -92,7 +92,7 @@ std::string pesieve::report_to_json(const pesieve::ReportEx& report, const t_rep
 		stream << "\n";
 	}
 	if (rtype == REPORT_ALL || rtype == REPORT_DUMPED) {
-		if (has_dumps) {
+		if (has_dumps || rtype == REPORT_DUMPED) { // do not output an empty report, unless requested specifically
 			OUT_PADDED(stream, level, "\"dump_report\" :\n");
 			stream << dump_report_to_json(*report.dump_report, jdetails, level);
 			stream << "\n";