fixes #350

Author: tux-mind

cSploit/src/org/csploit/android/net/metasploit/MsfExploit.java

@@ -87,7 +87,9 @@ public MsfExploit(String name, String summary, String description, Ranking rank,
     this.authors = authors;
     this.platforms = platforms;
     this.architectures = architectures;
-    this.references.addAll(references);
+    if(references != null) {
+      this.references.addAll(references);
+    }
 
     refresh();
   }