* Makefile.in (MALLOC_OFILES): Always fill in with correct malloc object.

* configure.in: Fill in MALLOC_OFILES with either debugging or regular malloc.
* configure: Regenerate.
* dlmalloc.c: Make various fruitless changes to attempt to get to work.
* dlmalloc.h: Ditto.
* malloc.cc (free): Check malloc pool when debugging.
* path.cc (win32_device_name): Eliminate compiler warning.
* sigproc.cc (sig_dispatch_pending): Remove use of was_pending.  Let
thisframe.call_signal_handler decide if handler should be called rather than
using bogus was_pending check.
* exceptions.cc (interrupt_setup): Remove accidentally checked in debugging
code.
* heap.cc (sbrk): Save rounded addess in user_heap_max.

winsup/cygwin/malloc.cc

@@ -3744,6 +3744,7 @@ void fREe(mem) Void_t* mem;
   mchunkptr       bck;         /* misc temp for linking */
   mchunkptr       fwd;         /* misc temp for linking */
 
+  check_malloc_state();
   /* free(0) has no effect */
   if (mem != 0) {
     p = mem2chunk(mem);
@@ -3878,6 +3879,7 @@ void fREe(mem) Void_t* mem;
 #endif
     }
   }
+    check_malloc_state();
 }
 
 /*