bug# 1241 ,check partition, modify fstab

add a yesorno dialog when check partition: if yes,continue; if no,exit
	modified:   dialog/di_dialog.py
	modified:   interface/ri_data.py
	modified:   interface/ri_tk_cmd.py
	modified:   xml/interface.xml

interface/ri_data.py

@@ -54,7 +54,7 @@ class Partition:
 
     @staticmethod
     def check_partitions():
-        cmd = "grep d[a-z][0-9] /proc/partitions>/dev/null"
+        cmd = "grep [a-zA-Z][0-9] /proc/partitions>/dev/null"
         ret = os.system(cmd)
         return ret