Fix for being unable to match patterns on zero-length files (or at the

end of a file)

files.c

@@ -164,6 +164,7 @@ void destroy_file(file_t **f)
 //
 size_t get_line_number(file_t *f, const char *p)
 {
+    if (f->nlines == 0) return 0;
     // Binary search:
     size_t lo = 0, hi = f->nlines-1;
     while (lo <= hi) {

match.c

@@ -138,7 +138,7 @@ match_t *next_match(def_t *defs, file_t *f, match_t *prev, pat_t *pat, pat_t *sk
     } else {
         str = f->contents;
     }
-    while (str < f->end) {
+    while (str <= f->end) {
         match_t *m = match(defs, f, str, pat, ignorecase);
         if (m) return m;
         match_t *s;