Use 0 instead of NAN and save setting

Author: batk0

MemoryMeter.c

@@ -40,9 +40,9 @@ static void MemoryMeter_updateValues(Meter* this) {
    this->values[MEMORY_METER_COMPRESSED] = NAN;
    this->values[MEMORY_METER_AVAILABLE] = NAN;
    Platform_setMemoryValues(this);
-   if (this->mode == GRAPH_METERMODE && !settings->showCachedMemory) {
-      this->values[MEMORY_METER_BUFFERS] = NAN;
-      this->values[MEMORY_METER_CACHE] = NAN;
+   if ((this->mode == GRAPH_METERMODE || this->mode == BAR_METERMODE) && !settings->showCachedMemory) {
+      this->values[MEMORY_METER_BUFFERS] = 0;
+      this->values[MEMORY_METER_CACHE] = 0;
    }
    /* Do not print available memory in bar mode */
    static_assert(MEMORY_METER_AVAILABLE + 1 == MEMORY_METER_ITEMCOUNT,

Settings.c

@@ -699,6 +699,7 @@ int Settings_write(const Settings* this, bool onCrash) {
    printSettingInteger("show_cpu_temperature", this->showCPUTemperature);
    printSettingInteger("degree_fahrenheit", this->degreeFahrenheit);
    #endif
+   printSettingInteger("show_cached_memory", this->showCachedMemory);
    printSettingInteger("update_process_names", this->updateProcessNames);
    printSettingInteger("account_guest_in_cpu_meter", this->accountGuestInCPUMeter);
    printSettingInteger("color_scheme", this->colorScheme);