Edited init.cpp to include a check that -datadir exists

src/init.cpp

@@ -140,10 +140,19 @@ bool AppInit2(int argc, char* argv[])
     ParseParameters(argc, argv);
 
     if (mapArgs.count("-datadir"))
+    {
+        if (filesystem::is_directory(filesystem::system_complete(mapArgs["-datadir"])))
         {
             filesystem::path pathDataDir = filesystem::system_complete(mapArgs["-datadir"]);
             strlcpy(pszSetDataDir, pathDataDir.string().c_str(), sizeof(pszSetDataDir));
         }
+        else
+        {
+            fprintf(stderr, "Error: Specified directory does not exist\n");
+            Shutdown(NULL);
+        }
+    }
+
 
     ReadConfigFile(mapArgs, mapMultiArgs); // Must be done after processing datadir