read 4 bytes to read descriptors on 64 bit windows, instead of 8

HeapProfile/ShowHeapProfile.icl

@@ -113,12 +113,12 @@ read_heap_file file_name files
 	  (_,data_begin,file) = IF_INT_64_OR_32 (freadi8 file) (freadi file);
 	  (_,small_integers,file) = IF_INT_64_OR_32 (freadi8 file) (freadi file);
 	  (_,characters,file) = IF_INT_64_OR_32 (freadi8 file) (freadi file);
-	  (_,int_descriptor,file) = IF_INT_64_OR_32 (freadi8 file) (freadi file);
-	  (_,char_descriptor,file) = IF_INT_64_OR_32 (freadi8 file) (freadi file);
-	  (_,real_descriptor,file) = IF_INT_64_OR_32 (freadi8 file) (freadi file);
-	  (_,bool_descriptor,file) = IF_INT_64_OR_32 (freadi8 file) (freadi file);
-	  (_,string_descriptor,file) = IF_INT_64_OR_32 (freadi8 file) (freadi file);
-	  (_,array_descriptor,file) = IF_INT_64_OR_32 (freadi8 file) (freadi file);
+	  (_,int_descriptor,file) = freadi file;
+	  (_,char_descriptor,file) = freadi file;
+	  (_,real_descriptor,file) = freadi file;
+	  (_,bool_descriptor,file) = freadi file;
+	  (_,string_descriptor,file) = freadi file;
+	  (_,array_descriptor,file) = freadi file;
 
 	# (error,file) = ferror file;
 	| error