win32: use a static buffer in get_system_drive()

Allocate static storage for the system drive string instead of
making a new allocation on every call.  This is easier to manage.

Adds 16 bytes.

1 files changed, 1 insertions, 2 deletions

diff --git a/shell/ash.c b/shell/ash.c
index db7b18957..7a2d0ab68 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -15245,7 +15245,7 @@ int ash_main(int argc UNUSED_PARAM, char **argv)
         struct stackmark smark;
         int login_sh;
 #if ENABLE_PLATFORM_MINGW32
-        char *sd;
+        const char *sd;
 
         INIT_G_memstack();
 
@@ -15366,7 +15366,6 @@ int ash_main(int argc UNUSED_PARAM, char **argv)
                 if (sd) {
                         char *path = xasprintf("%s/etc/profile", sd);
                         read_profile(path);
-                        free(sd);
                         free(path);
                 }
                 else