md5 in rvm-0.1.20

- old
+ new

@@ -7,10 +7,10 @@
 if [[ "Linux" = "$(uname)" ]] ; then
   command="md5sum"
   #md5sum --status -c "$file"
 elif [[ "Darwin" = "$(uname)" ]] ; then
   #md5 --status -c "$1"
-  command="md5"
+  command="/sbin/md5"
 fi
 
 file_md5=$($command $file | awk '{print $NF}')
 
 if [[ "$file_md5" = "$md5" ]] ; then