Cygwin: fix two comments in heap.cc and memory_layout.h

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/local_includes/memory_layout.h

@@ -16,8 +16,7 @@ details. */
    dynamicbase is accidentally not set in the PE/COFF header of the DLL. */
 #define CYGWIN_DLL_ADDRESS		0x180040000UL
 
-/* Area for non-fixed-address Cygwin-specific shared memory regions.  Fallback
-   for standard shared regions if the can't load at their default address. */
+/* Area for Cygwin-specific shared memory regions. */
 #define SHARED_REGIONS_ADDRESS_LOW	0x1a0000000UL
 #define SHARED_REGIONS_ADDRESS_HIGH	0x200000000UL
 

winsup/cygwin/mm/heap.cc

@@ -77,11 +77,11 @@ user_heap_info::init ()
 	  if (base)
 	    break;
 
-	  /* Ok, so we are at the 1% which didn't work with 0x20000000 out
+	  /* Ok, so we are at the 1% which didn't work with USERHEAP_START out
 	     of the box.  What we do now is to search for the next free
 	     region which matches our desired heap size.  While doing that,
 	     we keep track of the largest region we found, including the
-	     region starting at 0x20000000. */
+	     region starting at USERHEAP_START. */
 	  while ((ret = VirtualQuery ((LPCVOID) start_address, &mbi,
 				      sizeof mbi)) != 0)
 	    {