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Description of problem:
If gv is asked to open a zero-sized file, it says the file does not exist.

Version-Release number of selected component (if applicable):
gv-3.5.8-23

How reproducible:
Always

Steps to Reproduce:
1.create a zero-sized file named foo.ps
  $ > foo.ps
2.Ask gv to open it:
  $ gv foo.ps


Actual Results:  gv: Cannot open file foo.ps (No such file or directory)


Expected Results:  It should open the file and display a blank page, like it
does for a one-blank-line file.

Additional info:

strace seems to indicate it does fine the file, but it's probably not happy that
it has size zero.  When it has non-zero size, the first stat64 is followed by an
open.

stat64("foo.ps", {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
stat64("foo.ps.ps", 0xbff00be0)           = -1 ENOENT (No such file or directory)
stat64("foo.ps", {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
write(2, "gv: Cannot open file foo.ps (No su"..., 56gv: Cannot open file foo.ps
(No such file or directory)
) = 56
exit_group(1)                           = ?