Description:
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The extension load is broken dl too and return a empty 
result gdb backtrace gives nothing

Warning: dl(): Unable to load dynamic library /pathext/
some.so (null)

from dl and php.ini

the same report as made even if the .so file are not in 
etx dir

I've test from 4.3.3 src and all is ok




Reproduce code:
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from ini file

php -m

PHP Warning:  Unknown(): Unable to load dynamic library '/pathext/
some.so' - (null) in Unknown on line 0

if i remove the so file from exte dir it's the same