Index: sources/main.h
===================================================================
diff -u -r80b5e8f1ebb90c03c37d90d90cd2da3bd95d6803 -rf1c4d7f7c9cd4422f6190a5b31c8f1e74e520c04
--- sources/main.h	(.../main.h)	(revision 80b5e8f1ebb90c03c37d90d90cd2da3bd95d6803)
+++ sources/main.h	(.../main.h)	(revision f1c4d7f7c9cd4422f6190a5b31c8f1e74e520c04)
@@ -125,6 +125,14 @@
     if ( !ok ) LOG_DEBUG("incorrect configuration value for " #vVARIABLE);                  \
 }
 //--------------------------------------------------------------------------------//
+#define FROMVARIANT_WITHRETURN(vVARIABLE, vGROUP, vKEY, vCONVERSION, vOVERALL_OK)           \
+{                                                                                           \
+    bool ok = false;                                                                        \
+    vVARIABLE( _Settings.value(mCategory, vGROUP, vKEY).to##vCONVERSION(&ok) );             \
+    if ( !ok ) LOG_DEBUG("incorrect configuration value for " #vVARIABLE);                  \
+    vOVERALL_OK &= ok;                                                                      \
+}
+//--------------------------------------------------------------------------------//
 #define PROPERTY_SLOT(          vTYPE ,    vVARIABLE )                  \
     protected :                                                         \
         /*! \brief   Property setter