win32: export xappendword()

Export the function xappendword() from make.  Use it in drop and
watch.

Saves 8-80 bytes, an unusually large disparity.

1 files changed, 12 insertions, 0 deletions

diff --git a/win32/mingw.c b/win32/mingw.c
index e81f17f11..9e1cf5eea 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -2389,3 +2389,15 @@ const char *applet_to_exe(const char *name)
         return name;
 }
 #endif
+
+/*
+ * Append a word to a space-separated string of words.  The first
+ * call should use a NULL pointer for str, subsequent calls should
+ * pass an allocated string which will be freed.
+ */
+char *xappendword(const char *str, const char *word)
+{
+        char *newstr = str ? xasprintf("%s %s", str, word) : xstrdup(word);
+        free((void *)str);
+        return newstr;
+}