Code: Fixes condition is-output-path-relative.

Fixes #546.

lib/index.js

@@ -36,11 +36,11 @@ function getOutFile(options) {
   var outFile = options.outFile;
 
   if (!file || !outFile || typeof outFile !== 'string' || typeof file !== 'string') {
-    return false;
+    return null;
   }
 
-  if (path.resolve(outFile) !== path.normalize(outFile).replace(new RegExp(path.sep + '$'), '')) {
-    return false;
+  if (path.resolve(outFile) === path.normalize(outFile).replace(/(.+)([\/|\\])$/, '$1')) {
+    return outFile;
   }
 
   return path.resolve(path.dirname(file), outFile);
@@ -135,7 +135,7 @@ function getOptions(options) {
   options.data = options.data || null;
   options.file = options.file || null;
   options.imagePath = options.image_path || options.imagePath || '';
-  options.outFile = getOutFile(options) || null;
+  options.outFile = getOutFile(options);
   options.paths = (options.include_paths || options.includePaths || []).join(path.delimiter);
   options.precision = parseInt(options.precision) || 5;
   options.sourceMap = getSourceMap(options);