Fix compilation warnings in MinGW64 build using GCC 7

Reported by Richard Copley <rcopley@gmail.com>.
* src/w32heap.c (init_heap): Declare enable_lfh only for
mingw.org's MinGW build.

* src/w32console.c (w32con_write_glyphs):
* src/unexw32.c (get_section_info, COPY_CHUNK, unexec): Fix some
mismatches of data type vs format spec.

* src/w32fns.c (compute_tip_xy):
* src/w32proc.c (stop_timer_thread):
* src/w32notify.c (remove_watch):
* src/eval.c (internal_lisp_condition_case):
* src/editfns.c (Ftranslate_region_internal):
* src/data.c (Fmake_variable_buffer_local, cons_to_unsigned)
(cons_to_signed):
* src/buffer.c (fix_overlays_before): Initialize variables to
avoid compiler warnings.

* lib-src/etags.c (TeX_commands, process_file_name): Initialize
variables to avoid compilation warnings.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/w32console.c b/src/w32console.c
index 8df6379d407..a4c089fa964 100644
--- a/src/w32console.c
+++ b/src/w32console.c
@@ -333,7 +333,7 @@ w32con_write_glyphs (struct frame *f, register struct glyph *string,
                                            coding->produced, cursor_coords,
                                            &r))
             {
-              printf ("Failed writing console attributes: %d\n",
+              printf ("Failed writing console attributes: %lu\n",
                       GetLastError ());
               fflush (stdout);
             }
@@ -343,7 +343,7 @@ w32con_write_glyphs (struct frame *f, register struct glyph *string,
                                             coding->produced, cursor_coords,
                                             &r))
             {
-              printf ("Failed writing console characters: %d\n",
+              printf ("Failed writing console characters: %lu\n",
                       GetLastError ());
               fflush (stdout);
             }