shared: FileSaver: Don't launch SandboxedProcessor for empty files

shared/filesaver.cpp

@@ -124,6 +124,8 @@ SaveFileResult FileSaver::saveFile(const QFileInfo &fileInfo)
 			}
 		}
 
+		if(fileInfo.size() > 0)
+		{
 			QProcess process;
 			QStringList args;
 			args << "process" << canonicalPath;
@@ -156,6 +158,7 @@ SaveFileResult FileSaver::saveFile(const QFileInfo &fileInfo)
 				return static_cast<SaveFileResult>(processorReturnCode);
 			}
 		}
+	}
 	SaveFileResult result = this->dbService->saveFile(fileInfo, pageData);
 	if(result == OK && processorReturnCode == OK_WASEMPTY)
 	{