Merge pull request #195 from mikehaertl/194-fix-empty-error

Issue #194 Fix empty error messages

Author: mikehaertl

src/Pdf.php

@@ -376,6 +376,7 @@ public function getData($utf8 = true)
             $command = $this->getCommand();
             $command->setOperation($utf8 ? 'dump_data_utf8' : 'dump_data');
             if (!$command->execute()) {
+                $this->_error = $command->getError();
                 return false;
             } else {
                 $this->$property = new InfoFields(trim($command->getOutput()));
@@ -397,6 +398,7 @@ public function getDataFields($utf8 = true)
             $command = $this->getCommand();
             $command->setOperation($utf8 ? 'dump_data_fields_utf8' : 'dump_data_fields');
             if (!$command->execute()) {
+                $this->_error = $command->getError();
                 return false;
             } else {
                 $this->$property = new DataFields(trim($command->getOutput()));