fixed bug with null as first arg to source-map

sokra · sokra · commit 56fb0fe6d955 · 2015-03-03T23:41:28.000+01:00
diff --git a/lib/SourceMapDevToolPlugin.js b/lib/SourceMapDevToolPlugin.js
@@ -11,7 +11,7 @@ var CheapOriginalSource = require("webpack-core/lib/CheapOriginalSource")
 var ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
 
 function SourceMapDevToolPlugin(options, sourceMappingURLComment, moduleFilenameTemplate, fallbackModuleFilenameTemplate) {
-	if(typeof options !== "object") {
+	if(options && typeof options !== "object") {
 		this.sourceMapFilename = options;
 		this.sourceMappingURLComment = sourceMappingURLComment === false ? false : sourceMappingURLComment || "\n//# sourceMappingURL=[url]";
 		this.moduleFilenameTemplate = moduleFilenameTemplate || "webpack:///[resourcePath]";
