Warning on iterating over empty keys

[silfreed@…]

Line 317 of Phing.php has a loop over argument keys. When the args are empty, the warning below is issued.

Attached is a patch that resolves the issue by not iterating over an empty argument list.

Aug 27 09:23:00  [warning] max(): Array must contain at least one element (/path/to/pear/phing/Phing.php at line 317)
====backtrace ====                                                                  
#0  max() called at [/path/to/pear/phing/Phing.php:317] args{Array}                                                  
#1  Phing->execute() called at [/path/to/pear/phing/Phing.php:157] args{Array}                                       
#2  Phing::start() called at [/path/to/pear/phing/Phing.php:270] args{Array, }                                       
#3  Phing::fire() called at [/path/to/phingcmd.php:40] args{Array}

[mrook]

Duplicate of #265.