Use integer type for item count instead of char

CPUMeter.c

@@ -51,8 +51,7 @@ static void CPUMeter_updateValues(Meter* this, char* buffer, int size) {
    int cpu = this->param;
    if (cpu > this->pl->cpuCount) {
       xSnprintf(buffer, size, "absent");
-      int items = this->curItems;
-      for (int i = 0; i < items; i++)
+      for (uint8_t i = 0; i < this->curItems; i++)
          this->values[i] = 0;
       return;
    }

Meter.c

@@ -195,8 +195,7 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
 
    // First draw in the bar[] buffer...
    int offset = 0;
-   int items = this->curItems;
-   for (int i = 0; i < items; i++) {
+   for (uint8_t i = 0; i < this->curItems; i++) {
       double value = this->values[i];
       value = CLAMP(value, 0.0, this->total);
       if (value > 0) {
@@ -220,7 +219,7 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
 
    // ...then print the buffer.
    offset = 0;
-   for (int i = 0; i < items; i++) {
+   for (uint8_t i = 0; i < this->curItems; i++) {
       attrset(CRT_colors[Meter_attributes(this)[i]]);
       mvaddnstr(y, x + offset, bar + offset, blockSizes[i]);
       offset += blockSizes[i];
@@ -296,8 +295,7 @@ static void GraphMeterMode_draw(Meter* this, int x, int y, int w) {
       Meter_updateValues(this, buffer, nValues - 1);
 
       double value = 0.0;
-      int items = this->curItems;
-      for (int i = 0; i < items; i++)
+      for (uint8_t i = 0; i < this->curItems; i++)
          value += this->values[i];
       value /= this->total;
       data->values[nValues - 1] = value;

Meter.h

@@ -42,7 +42,7 @@ typedef struct MeterClass_ {
    const char* const uiName;
    const char* const caption;
    const char* const description;
-   const char maxItems;
+   const uint8_t maxItems;
 } MeterClass;
 
 #define As_Meter(this_)                ((const MeterClass*)((this_)->super.klass))
@@ -75,7 +75,7 @@ struct Meter_ {
    GraphData* drawData;
    int h;
    const ProcessList* pl;
-   char curItems;
+   uint8_t curItems;
    double* values;
    double total;
    void* meterData;