Fix `nvm ls v1.0.3` so that it locates `iojs-v1.0.3`.

Also fix `nvm uninstall v1.0.3` so it won't uninstall it if it's the current version.

node versions will still take priority if there's ever a version overlap.

nvm.sh

@@ -469,6 +469,8 @@ nvm_ls() {
   if [ "_$(echo "$PATTERN" | cut -c1-1)" = "_v" ] && [ "_$(nvm_num_version_groups "$PATTERN")" = "_3" ]; then
     if [ -d "$(nvm_version_path "$PATTERN")" ]; then
       VERSIONS="$PATTERN"
+    elif [ -d "$(nvm_version_path "$(nvm_add_iojs_prefix "$PATTERN")")" ]; then
+      VERSIONS="$(nvm_add_iojs_prefix "$PATTERN")"
     fi
   else
     case "$PATTERN" in
@@ -1081,8 +1083,8 @@ nvm() {
           VERSION="$(nvm_version "$PATTERN")"
         ;;
       esac
-      if [ "_$PATTERN" = "_$(nvm_ls_current)" ]; then
-        if nvm_is_iojs_version "$PATTERN"; then
+      if [ "_$VERSION" = "_$(nvm_ls_current)" ]; then
+        if nvm_is_iojs_version "$VERSION"; then
           echo "nvm: Cannot uninstall currently-active io.js version, $VERSION (inferred from $PATTERN)." >&2
         else
           echo "nvm: Cannot uninstall currently-active node version, $VERSION (inferred from $PATTERN)." >&2

test/slow/nvm use/Running "nvm use v1.0.0" uses iojs-v1.0.0 iojs version

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+die () { echo $@ ; exit 1; }
+
+. ../../../nvm.sh
+
+nvm deactivate 2>&1 >/dev/null || die 'deactivate failed'
+
+nvm use 'v1.0.0' || die 'nvm use v1.0.0 failed'
+OUTPUT="$(nvm current)"
+EXPECTED_OUTPUT="$(nvm_version v1.0.0)"
+
+[ "_$OUTPUT" = "_$EXPECTED_OUTPUT" ] \
+  || die "'nvm use v1.0.0' + 'nvm current' did not output '$EXPECTED_OUTPUT'; got '$OUTPUT'"