- Quote the 'executable' argument when trying to detect the python version using popen4.

CHANGES.txt

@@ -7,6 +7,9 @@ Change History
 1.0.4 (unreleased)
 ==================
 
+- Quote the 'executable' argument when trying to detect the python 
+  version using popen4. (sidnei)
+
 - Quote the 'spec' argument, as in the case of installing an egg from
   the buildout-cache, if the filename contains spaces it would fail (sidnei)
 

src/zc/buildout/easy_install.py

@@ -61,7 +61,7 @@ def _get_version(executable):
     try:
         return _versions[executable]
     except KeyError:
-        i, o = os.popen4(executable + ' -V')
+        i, o = os.popen4(_safe_arg(executable) + ' -V')
         i.close()
         version = o.read().strip()
         o.close()