make WLED_MAX_BUSSES constexpr

prevent macro expansion problems, because  WLED_MAX_ANALOG_CHANNELS is a constexpr now.

Author: softhack007

wled00/const.h

@@ -66,6 +66,9 @@ constexpr size_t FIXED_PALETTE_COUNT = DYNAMIC_PALETTE_COUNT + FASTLED_PALETTE_C
   #endif
 
   // define -> constexpr to avoid preprocessor errors and enum arithmetic warnings from newer compilers
+  #ifdef WLED_MAX_ANALOG_CHANNELS
+    #undef WLED_MAX_ANALOG_CHANNELS   // avoid clash between macro name and constexpr constant
+  #endif
   constexpr size_t WLED_MAX_ANALOG_CHANNELS = static_cast<size_t>(LEDC_CHANNEL_MAX) * static_cast<size_t>(LEDC_SPEED_MODE_MAX);
 
   #if defined(CONFIG_IDF_TARGET_ESP32C3)    // 2 RMT, 6 LEDC, only has 1 I2S but NPB does not support it ATM
@@ -103,7 +106,8 @@ constexpr size_t FIXED_PALETTE_COUNT = DYNAMIC_PALETTE_COUNT + FASTLED_PALETTE_C
 #ifdef WLED_MAX_BUSSES
   #undef WLED_MAX_BUSSES
 #endif
-#define WLED_MAX_BUSSES (WLED_MAX_DIGITAL_CHANNELS+WLED_MAX_ANALOG_CHANNELS)
+// define -> constexpr to align with defintion of WLED_MAX_ANALOG_CHANNELS
+constexpr size_t WLED_MAX_BUSSES = WLED_MAX_DIGITAL_CHANNELS + WLED_MAX_ANALOG_CHANNELS;
 static_assert(WLED_MAX_BUSSES <= 32, "WLED_MAX_BUSSES exceeds hard limit");
 
 // Maximum number of pins per output. 5 for RGBCCT analog LEDs.