scripts/patches in rvm-1.0.5 vs scripts/patches in rvm-1.0.6

@@ -10,29 +10,47 @@
   echo "$PWD/"
   __rvm_ruby_string_paths_under "$rvm_patches_path" | sed 's/$/\//'
 }
 
 __rvm_expand_patch_name() {
-  local name="$1"
+  local name expanded_patch_name
+
+  name="${1:-""}"
+
   [[ -z "$name" ]] && return 0
+
   expanded_patch_name="$("$rvm_scripts_path/patchsets" show "$name")"
+
   if [[ "$?" == "0" ]]; then
     echo "${expanded_patch_name}"
+
   elif [[ "$name" != "default" ]]; then
     echo "$name"
-  fi ; unset expanded_patch_name
+  fi
+
+  return 0
 }
 
 # Return the full patch for a given patch.
 __rvm_lookup_full_patch_path() {
+  local extension patch_path directory directories
+
   # Absolute path, pwd and then finally the rvm patches path.
-  for directory in $(__rvm_patch_lookup_path) ; do
+  directories=($(__rvm_patch_lookup_path))
+
+  for directory in "${directories[@]}" ; do
+
     for extension in {"",.patch,.diff}; do
+
       patch_path="${directory}${1}${extension}"
+
       if [[ -s "$patch_path" ]]; then
         echo "$patch_path"
-        return
+        return 0
       fi
-    done; unset extension patch_path
-  done; unset directory
+
+    done
+
+  done
+
   return 1
 }