Patch from Lars Kellogg-Stedman <lars@larsshack.org> to fix bug
#1130 (i.e. When you turn on features it should always ADD features)
diff --git a/shell/lash.c b/shell/lash.c
index cb17e2d..f1200ba 100644
--- a/shell/lash.c
+++ b/shell/lash.c
@@ -436,7 +436,7 @@
res = putenv(v);
if (res)
fprintf(stderr, "export: %m\n");
-#ifndef BB_FEATURE_SH_SIMPLE_PROMPT
+#ifdef BB_FEATURE_SH_FANCY_PROMPT
if (strncmp(v, "PS1=", 4)==0)
PS1 = getenv("PS1");
#endif
@@ -809,7 +809,7 @@
static inline void cmdedit_set_initial_prompt(void)
{
-#ifdef BB_FEATURE_SH_SIMPLE_PROMPT
+#ifndef BB_FEATURE_SH_FANCY_PROMPT
PS1 = NULL;
#else
PS1 = getenv("PS1");
@@ -820,7 +820,7 @@
static inline void setup_prompt_string(char **prompt_str)
{
-#ifdef BB_FEATURE_SH_SIMPLE_PROMPT
+#ifndef BB_FEATURE_SH_FANCY_PROMPT
/* Set up the prompt */
if (shell_context == 0) {
if (PS1)