processing: fix path setting for saga

Author: jef-n

python/plugins/processing/algs/saga/SagaUtils.py

@@ -89,7 +89,7 @@ def createSagaBatchJobFileFromSagaCommands(commands):
         fout.write('set SAGA=' + sagaPath() + '\n')
         fout.write('set SAGA_MLB=' + sagaPath() + os.sep
                    + 'modules' + '\n')
-        fout.write('PATH=PATH;%SAGA%;%SAGA_MLB%\n')
+        fout.write('PATH=%PATH%;%SAGA%;%SAGA_MLB%\n')
     elif isMac():
         fout.write('export SAGA_MLB=' + sagaPath()
                    + '/../lib/saga\n')