cannot run tests when using PERL5LIB (e.g. when using local::lib)

[Gabor Szabo]

When trying to run ./runtests.pl the test t/001compile.t blows up as I am using
local::lib and I have PERL5LIB configured to locate the privately installed
modules.

This patch fixes it.
Does it look reasonable?


=== modified file 't/001compile.t'
--- t/001compile.t	2009-11-18 07:01:40 +0000
+++ t/001compile.t	2010-02-11 21:24:22 +0000
@@ -59,8 +59,12 @@
         $T = "T";
     }

+    my $libs = '';
+    if ($ENV{PERL5LIB}) {
+       $libs = join " ", map { "-I$_" } split /:/, $ENV{PERL5LIB};
+    }
     my $perl = qq{"$^X"};
-    my $output = `$perl -wc$T $file 2>&1`;
+    my $output = `$perl $libs -wc$T $file 2>&1`;
     chomp($output);
     my $return_val = $?;
     $output =~ s/^\Q$file\E syntax OK$//ms;