Description of problem:

  When you try to install a package and pass an empty string for the package 
name, rpm prints an error message on STDERR but returns a status of 0. It 
should either not print an error, or return 1.

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

  rpm-4.4.2-47.el5

How reproducible:

  Always

Steps to Reproduce:

Where "ksjkjdksjdkjsd" is a file which doesn't exist, as root:

1. rpm -i "ksjkjdksjdkjsd.rpm"; echo "Return: $?"
2. rpm -i ""; echo "Return: $?"
  
Actual results:

1. rpm -i "klkskdlsklks"; echo "Return: $?"
error: open of klkskdlsklks failed: No such file or directory
Return: 1

2. rpm -i ""; echo "Return: $?"
error: File not found by glob:
Return: 0

Expected results:

1. rpm -i "klkskdlsklks"; echo "Return: $?"
error: open of klkskdlsklks failed: No such file or directory
Return: 1

2. rpm -i ""; echo "Return: $?"
error: File not found by glob:
Return: 0

Additional info:

If the usage case in 2 is an error, it should not return 0. If it is not an 
error, it should not say that it is an error.