Return control to pyenv-uninstall in uninstall/envs.bash

Fixes #320

Author: aiguofer

etc/pyenv.d/uninstall/envs.bash

@@ -15,8 +15,8 @@ if [ -n "${DEFINITION}" ]; then
       REAL_DEFINITION="${REAL_PREFIX#${PYENV_ROOT}/versions/}"
       if [[ "${REAL_DEFINITION}" != "${REAL_DEFINITION%/envs/*}" ]]; then
         # Uninstall virtualenv by short name
-        exec pyenv-virtualenv-delete ${FORCE+-f} "${REAL_DEFINITION}"
-        exit 128
+        pyenv-virtualenv-delete ${FORCE+-f} "${REAL_DEFINITION}"
+        FORCE=t
       fi
     else
       # Uninstall all virtualenvs inside `envs` directory too