Fix detect current version if not has install images.

pym/cl_fill_install.py

@@ -838,6 +838,8 @@ class fillVars(object, glob_attr):
 
     def get_os_install_linux_ver(self):
         """Linux version of installation os"""
+        if self.Get('cl_action') != "system":
+            return self.Get('os_linux_ver')
         imagename = self.getImage(self.Get('os_install_scratch'),
                                   self.Get('os_install_root_type'),
                                   self.Get('cl_image_path'),
@@ -845,8 +847,6 @@ class fillVars(object, glob_attr):
                                   self.Get('os_install_linux_shortname'))
         if not imagename and self.Get('cl_action') != 'merge':
             return ""
-        if self.Get('cl_action') != "system":
-            return self.Get('os_linux_ver')
         d = DistributiveRepository()._getfromcontent(imagename)
         if "linuxver" in d and d['linuxver'] != "0":
             return d['linuxver']