revert change to free heap check, add commented code (for future use)

- free heap check in main loop should not be free contiguous heap check, it leads to random strip resets if heap runs low.

Author: DedeHai

wled00/util.cpp

@@ -668,6 +668,11 @@ void *d_calloc(size_t count, size_t size) {
 
 // realloc with malloc fallback, note: on ESPS8266 there is no safe way to ensure MIN_HEAP_SIZE during realloc()s, free buffer and allocate new one
 void *d_realloc_malloc(void *ptr, size_t size) {
+  //void *buffer = realloc(ptr, size);
+  //buffer = validateFreeHeap(buffer);
+  //if (buffer) return buffer; // realloc successful
+  //d_free(ptr); // free old buffer if realloc failed (or min heap was exceeded)
+  //return d_malloc(size); // fallback to malloc
   free(ptr);
   return d_malloc(size);
 }

wled00/wled.cpp

@@ -171,7 +171,7 @@ void WLED::loop()
 
   // reconnect WiFi to clear stale allocations if heap gets too low
   if (millis() - heapTime > 15000) {
-    uint32_t heap = getContiguousFreeHeap();
+    uint32_t heap = getFreeHeapSize();
     if (heap < MIN_HEAP_SIZE && lastHeap < MIN_HEAP_SIZE) {
       DEBUG_PRINTF_P(PSTR("Heap too low! %u\n"), heap);
       forceReconnect = true;