Fix minor alloc.c problems found by static checking.

* alloc.c (_malloc_internal, _free_internal) [!DOUG_LEA_MALLOC]:
New extern decls, to avoid calling undeclared functions.
(dont_register_blocks): Define if ((!SYSTEM_MALLOC && !SYNC_INPUT)
&& GC_MALLOC_CHECK), not if ((GC_MARK_STACK || defined
GC_MALLOC_CHECK) && GC_MALLOC_CHECK), to match when it's used.
(NEED_MEM_INSERT): New macro.
(mem_insert, mem_insert_fixup) [!NEED_MEM_INSERT]: Remove; unused.

1 files changed, 15 insertions, 1 deletions

diff --git a/src/alloc.c b/src/alloc.c
index 0e68817629c..9589ae05e95 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -82,6 +82,8 @@ extern POINTER_TYPE *sbrk ();
 
 extern size_t _bytes_used;
 extern size_t __malloc_extra_blocks;
+extern void *_malloc_internal (size_t);
+extern void _free_internal (void *);
 
 #endif /* not DOUG_LEA_MALLOC */
 
@@ -314,7 +316,6 @@ static Lisp_Object Vdead;
 #ifdef GC_MALLOC_CHECK
 
 enum mem_type allocated_mem_type;
-static int dont_register_blocks;
 
 #endif /* GC_MALLOC_CHECK */
 
@@ -391,8 +392,13 @@ static int live_misc_p (struct mem_node *, void *);
 static void mark_maybe_object (Lisp_Object);
 static void mark_memory (void *, void *);
 static void mem_init (void);
+#if (defined GC_MALLOC_CHECK                         \
+     ? !defined SYSTEM_MALLOC && !defined SYNC_INPUT \
+     : GC_MARK_STACK)
+# define NEED_MEM_INSERT
 static struct mem_node *mem_insert (void *, void *, enum mem_type);
 static void mem_insert_fixup (struct mem_node *);
+#endif
 static void mem_rotate_left (struct mem_node *);
 static void mem_rotate_right (struct mem_node *);
 static void mem_delete (struct mem_node *);
@@ -1223,6 +1229,10 @@ static void (*old_free_hook) (void*, const void*);
 #  define BYTES_USED _bytes_used
 #endif
 
+#ifdef GC_MALLOC_CHECK
+static int dont_register_blocks;
+#endif
+
 static size_t bytes_used_when_reconsidered;
 
 /* Value of _bytes_used, when spare_memory was freed.  */
@@ -3571,6 +3581,8 @@ mem_find (void *start)
 }
 
 
+#ifdef NEED_MEM_INSERT
+
 /* Insert a new node into the tree for a block of memory with start
    address START, end address END, and type TYPE.  Value is a
    pointer to the node that was inserted.  */
@@ -3718,6 +3730,8 @@ mem_insert_fixup (struct mem_node *x)
   mem_root->color = MEM_BLACK;
 }
 
+#endif /* NEED_MEM_INSERT */
+
 
 /*   (x)                   (y)
      / \                   / \