added explicit check if PEDI_HOME is set to avoid key error when it is not.

Former-commit-id: 77b8f93a9c98bb8577182f66ea48339fcb6f6d4c

SConscript

@@ -89,11 +89,11 @@ if int(argenv['build_irdb']) == 1 or int(argenv['build_irdb_driver']) == 1:
 
 Default(lib)
 
-
-pedi = Command( target = "./testoutput",
-		source = "./SConscript",
-                action = "if [ -f manifest.txt.config ]; then "+os.environ['PEDI_HOME']+"/pedi -m manifest.txt ; else echo Skipping PEDI; fi" )
-Default( pedi )
+if 'PEDI_HOME' in os.environ:
+	pedi = Command( target = "./testoutput",
+			source = "./SConscript",
+			action = "if [ -f manifest.txt.config ]; then "+os.environ['PEDI_HOME']+"/pedi -m manifest.txt ; else echo Skipping PEDI; fi" )
+	Default( pedi )