sdl2-compat: fix standalone mingw makefile.

From 01b156fca839789b97fe6eab91f6b29278d98977 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Wed, 8 Feb 2023 21:55:10 +0300
Subject: [PATCH] fix standalone mingw makefile.

---
 src/Makefile.mingw | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Makefile.mingw b/src/Makefile.mingw
index 60cc8db..138b097 100644
--- a/src/Makefile.mingw
+++ b/src/Makefile.mingw
@@ -41,6 +41,6 @@ $(DLL): $(OBJ)
 	$(RC) -o $@ $<
 
 distclean: clean
-	$(RM) $(DLL) $(LIB)
+	$(RM) $(DLL) $(IMPLIB)
 clean:
 	$(RM) *.o dynapi/*.o