Prevent crash on loading empty game file

The parser code is made resistant to loading a file with 0 characters in it.

diff --git a/parser.c b/parser.c
index c2eda2b..e325005 100644 (file)
--- a/parser.c
+++ b/parser.c
@@ -404,7 +404,7 @@ NextUnit (char **p)
 
        if(**p == NULLCHAR) { // make sure there is something to parse
            if(fromString) return 0; // we are parsing string, so the end is really the end
-           *p = inPtr = inputBuf;
+           *p = inPtr = parseStart = inputBuf;
            if(!ReadLine()) return 0; // EOF
        } else if(inPtr > inputBuf + PARSEBUFSIZE/2) { // buffer fills up with already parsed stuff
            char *q = *p, *r = inputBuf;