fix for #80, checking for body before setting content-type header

Author: fehguy

lib/swagger.js

@@ -1,5 +1,5 @@
 // swagger.js
-// version 2.0.17
+// version 2.0.19
 
 var __bind = function(fn, me){
   return function(){
@@ -980,7 +980,7 @@ var SwaggerRequest = function(type, url, params, opts, successCallback, errorCal
   }
   for (name in this.headers)
     myHeaders[name] = this.headers[name];
-  if (requestContentType)
+  if (requestContentType && body)
     myHeaders["Content-Type"] = requestContentType;
   if (responseContentType)
     myHeaders["Accept"] = responseContentType;

package.json

@@ -8,7 +8,7 @@
     }
   ],
   "description": "swagger.js is a javascript client for use with swaggering APIs.",
-  "version": "2.0.18",
+  "version": "2.0.19",
   "homepage": "http://swagger.wordnik.com",
   "repository": {
     "type": "git",