X-Git-Url: http://j8takagi.net/cgi-bin/gitweb.cgi?p=YACASL2.git;a=blobdiff_plain;f=src%2Fword.c;fp=src%2Fword.c;h=74a2786bc381ca319a1a3db843f0dce7f6021096;hp=d26438f4ba8e05405a984077278b044c0a7c5d46;hb=730611ebee687534d03ddfa6539b634a466e59fd;hpb=dd0cec4b6ab0298d869e08a6b8bede963c5077f7

diff --git a/src/word.c b/src/word.c
index d26438f..74a2786 100644
--- a/src/word.c
+++ b/src/word.c
@@ -84,6 +84,9 @@ WORD nh2word(const char *str)
     WORD w;
 
     assert(sizeof(WORD) * 8 == 16); /* WORD型のサイズが16ビットであることを確認 */
+    if(str == NULL) {
+        return 0x0;
+    }
     if(!isdigit(*str) && *str != '-' && *str != '#') {
         setcerr(114, str);    /* not integer */
         return 0x0;