make clean: removing .so file

Makefile

@@ -135,4 +135,4 @@ release: clean
 	F=mongoose-`perl -lne '/define\s+MONGOOSE_VERSION\s+"(\S+)"/ and print $$1' mongoose.c`.tgz ; cd .. && tar --exclude \*.hg --exclude \*.svn --exclude \*.swp --exclude \*.nfs\* -czf x mongoose && mv x mongoose/$$F
 
 clean:
-	rm -rf *.o *.core $(PROG) *.obj $(PROG).txt *.dSYM *.tgz
+	rm -rf *.o *.core $(PROG) *.obj *.so $(PROG).txt *.dSYM *.tgz