fixed up some typos and irregularities

Author: pellepl

README

@@ -8,7 +8,7 @@ To be used in an embedded environment with small ram.
 
 Use the heap by doing something like this:
 
-  #include "tinyheap.c"
+  #include "tinyheap.h"
 
   // use this space as heap
   static char heap_space[4096];

src/tinyheap.c

@@ -306,11 +306,11 @@ void th_free(tinyheap* heap, void* p) {
 #if TH_DUMP
 void th_dump(tinyheap* heap) {
 #if TH_SEEK_STRAT_MIN_MAX
-  heap->smallFree = 0;
-  heap->bigFree = 0;
+  //heap->smallFree = 0;
+  //heap->bigFree = 0;
 #endif
 #if TH_SEEK_STRAT_LAST_FREE
-  heap->lastFree = 0;
+  //heap->lastFree = 0;
 #endif