scripts/patches in rvm-1.0.2 vs scripts/patches in rvm-1.0.3

@@ -10,15 +10,16 @@
   echo "$PWD/"
   __rvm_ruby_string_paths_under "$rvm_patches_path" | sed 's/$/\//'
 }
 
 __rvm_expand_patch_name() {
-  [[ -z "$1" ]] && return
-  expanded_patch_name="$("$rvm_scripts_path/patchsets" show "$1")"
+  local name="$1"
+  [[ -z "$name" ]] && return 0
+  expanded_patch_name="$("$rvm_scripts_path/patchsets" show "$name")"
   if [[ "$?" == "0" ]]; then
-    echo "$expanded_patch_name"
-  elif [[ "$1" != "default" ]]; then
-    echo "$1"
+    echo "${expanded_patch_name}"
+  elif [[ "$name" != "default" ]]; then
+    echo "$name"
   fi ; unset expanded_patch_name
 }
 
 # Return the full patch for a given patch.
 __rvm_lookup_full_patch_path() {