remove a bug and the subsequent bugfix

'node' is concatenated to the name of the rna file without spaces, and exec'ed.
This can't work and requires a subsequent retry, with the space this time. The
solution is simple to remove the first exec call.

ribosome.js

@@ -405,6 +405,7 @@ Array.prototype.last = function() {
 var fs = require('fs');
 var path = require('path');
 var exec = require('child_process').exec;
+var exec = require('child_process').exec;
 
 
 function addslashes(str) {
@@ -630,21 +631,14 @@ if (rnaopt) {
 }
 
 if (!rnaopt) {
-    exec("node" + rnafile + " " + process.argv.slice(3).join(' '), function(error, stdout, stderr) {
-        if(stderr != "") {
-            exec("node " + rnafile + " " + process.argv.slice(3).join(' '), function(error, stdout, stderr) {
-                process.stdout.write(stdout);
-                process.stdout.write(stderr);
-                fs.unlinkSync(rnafile);
-
-                if (error) {
-                    process.exit(error.code);
-                }
-            });
-        } else {
+    exec("node " + rnafile + " " + process.argv.slice(3).join(' '),
+         function(error, stdout, stderr) {
             process.stdout.write(stdout);
+            process.stdout.write(stderr);
             fs.unlinkSync(rnafile);
-        }
-    });
+
+            if (error)
+                process.exit(error.code);
+         });
 }