settings: load scan defaults before save scan.conf

Origin commit data
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Commit: c6847ab684
Author: vanhofen <vanhofen@gmx.de>
Date: 2021-02-09 (Tue, 09 Feb 2021)

Origin message was:
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- settings: load scan defaults before save scan.conf

src/system/settings.cpp

@@ -22,6 +22,7 @@
 */
 
 #include <cstring>
+#include <unistd.h>
 #include <system/settings.h>
 
 #include <zapit/settings.h>
@@ -190,6 +191,10 @@ bool CScanSettings::loadSettings(const char * const fileName)
 
 bool CScanSettings::saveSettings(const char * const fileName)
 {
+	// get sure we got initialized variables
+	if (access(fileName, R_OK) != 0)
+		loadSettings(fileName);
+
 	configfile.setInt32("bouquetMode", bouquetMode);
 	configfile.setInt32("scanType", scanType);