* shared_info.h (SHARED_INFO_CB): Accommodate change to shared_info.

(CURR_SHARED_MAGIC): Ditto.
	(class shared_info): Add heap_slop_inited member.
	* shared.cc (shared_info::heap_slop_size): Use heap_slop_inited to
	track initializing heap_slop since 0 is a valid value for heap_slop.
	Drop useless < 0 consideration.

winsup/cygwin/shared.cc

@@ -262,7 +262,7 @@ memory_init ()
 unsigned
 shared_info::heap_slop_size ()
 {
-  if (!heap_slop)
+  if (!heap_slop_inited)
     {
       /* Fetch from registry, first user then local machine.  */
       for (int i = 0; i < 2; i++)
@@ -273,11 +273,8 @@ shared_info::heap_slop_size ()
 	    break;
 	  heap_slop = wincap.heapslop ();
 	}
-
-      if (heap_slop < 0)
-	heap_slop = 0;
-      else
-	heap_slop <<= 20;
+      heap_slop <<= 20;
+      heap_slop_inited = true;
     }
 
   return heap_slop;