win32: code shrink Unix-style path handling

Replace auto_add_system_drive() with alloc_system_drive() which
leaves space for a possible filename extension.  This makes it
possible to drop alloc_win32_extension() and auto_win32_extension().

Saves 144 bytes.

1 files changed, 2 insertions, 1 deletions

diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index f6577e372..b35da1874 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -913,8 +913,9 @@ static NOINLINE unsigned complete_cmd_dir_file(const char *command, int type)
                 struct dirent *next;
                 struct stat st;
                 char *found;
+
 #if ENABLE_PLATFORM_MINGW32
-                char *lpath = auto_add_system_drive(paths[i]);
+                char *lpath = auto_string(alloc_system_drive(paths[i]));
                 dir = opendir(lpath);
 #else
                 dir = opendir(paths[i]);