Prevent crash on help-click for engine without manual

[xboard.git] / dialogs.c

diff --git a/dialogs.c b/dialogs.c
index d3b333e..9b48704 100644 (file)
--- a/dialogs.c
+++ b/dialogs.c
@@ -2691,7 +2691,9 @@ DisplayHelp (char *name)
            FREE(manText[1]); manText[1] = NULL;      // so any currently held text is worthless
            safeStrCpy(tidy, buf, MSG_SIZ);           // remember current engine
            eng = BufferCommandOutput(tidy, MSG_SIZ); // obtain path to  its man file
+           if(*eng)
            safeStrCpy(engMan, eng, strlen(eng));     // and remember that too
+           else *engMan = NULLCHAR;
            FREE(eng);
        }
        safeStrCpy(buf, engMan, MSG_SIZ); n = 1;      // use engine man