fix make genfilelist to avoid vim swp files

Makefile

@@ -316,7 +316,8 @@ genfilelist:
 	@echo '=-=-=-=-= IOCCC begin make $@ =-=-=-=-='
 	@-for i in ${YEARS}; do \
 	    ${RM} -f "$$i/.genfilelist.tmp"; \
-	    ${FIND} "$$i" -mindepth 1 -maxdepth 1 -type f ! -path "$$i/.genfilelist.tmp" ! -name .DS_Store | \
+	    ${FIND} "$$i" -mindepth 1 -maxdepth 1 -type f ! -path "$$i/.genfilelist.tmp" \
+		    ! -name .DS_Store ! -name '*.swp' | \
 	      ${SORT} -f -d -u > "$$i/.genfilelist.tmp"; \
 	    if ${CMP} -s "$$i/.genfilelist.tmp" "$$i/.filelist"; then \
 		${RM} -f "$$i/.genfilelist.tmp"; \