fix for header undefined

dist/lib/swagger-client.js

@@ -733,10 +733,10 @@ Operation.prototype.setContentTypes = function(args, opts) {
       definedFormParams.push(param);
     else if(param.in === 'file')
       definedFileParams.push(param);
-    else if(param.in === 'header' && this.params.headers) {
+    else if(param.in === 'header' && this.headers) {
       var key = param.name;
-      var headerValue = this.params.headers[param.name];
-      if(typeof this.params.headers[param.name] !== 'undefined')
+      var headerValue = this.headers[param.name];
+      if(typeof this.headers[param.name] !== 'undefined')
         headers[key] = headerValue;
     }
   }

lib/swagger-client.js

@@ -733,10 +733,10 @@ Operation.prototype.setContentTypes = function(args, opts) {
       definedFormParams.push(param);
     else if(param.in === 'file')
       definedFileParams.push(param);
-    else if(param.in === 'header' && this.params.headers) {
+    else if(param.in === 'header' && this.headers) {
       var key = param.name;
-      var headerValue = this.params.headers[param.name];
-      if(typeof this.params.headers[param.name] !== 'undefined')
+      var headerValue = this.headers[param.name];
+      if(typeof this.headers[param.name] !== 'undefined')
         headers[key] = headerValue;
     }
   }