Reorder conditions that are written backwards

Reorder conditions that are written backwards

* alloc.c (xnmalloc, xnrealloc, xpalloc, make_save_value)
(Fgarbage_collect): Reorder conditions that are written backwards.
* data.c (cons_to_unsigned): Likewise.
* dispnew.c (update_frame_1, sit_for): Likewise.
* fileio.c (file_offset): Likewise.
* filelock.c (read_lock_data, lock_file): Likewise.
* fns.c (larger_vector, make_hash_table, Fmake_hash_table):
Likewise.
* font.c (font_intern_prop, font_style_symbolic): Likewise.
* lisp.h (FIXNUM_OVERFLOW_P): Likewise.
* lread.c (read1): Likewise.
* minibuf.c (read_minibuf_noninteractive): Likewise.
* nsterm.m (x_set_frame_alpha): Likewise.
* process.c (wait_reading_process_output): Likewise.
* region-cache.c (delete_cache_boundaries): Likewise.
* xterm.c (x_set_frame_alpha): Likewise.