xcrun wrapper: inline try method

Library/ENV/4.3/xcrun

@@ -25,12 +25,11 @@ end
 
 SUPERBIN = canonical_dirname(__FILE__)
 
-def try path
-  exec path, *ARGV if File.executable?(path) && canonical_dirname(path) != SUPERBIN
-end
-
 arg0 = ARGV.shift
-try `/usr/bin/xcrun --find #{arg0} 2>/dev/null`.chomp
+exe = `/usr/bin/xcrun --find #{arg0} 2>/dev/null`.chomp
+if File.executable?(exe) && canonical_dirname(exe) != SUPERBIN
+  exec(exe, *ARGV)
+end
 
 paths = ENV["PATH"].split(File::PATH_SEPARATOR)
 paths.delete(SUPERBIN)