inpcom.c, inp_read(), rewrite appending to the tail

src/frontend/inpcom.c

@@ -824,11 +824,11 @@ inp_read(FILE *fp, int call_depth, char *dir_name, bool comfile, bool intfile)
 
                 if (end)
                     end->li_next = x;
-                else
-                    cc = x;
-
                 end = x;
 
+                if (!cc)
+                    cc = end;
+
                 line_number++;
             }
 
@@ -905,10 +905,10 @@ inp_read(FILE *fp, int call_depth, char *dir_name, bool comfile, bool intfile)
 
             if (end)
                 end->li_next = x;
-            else
-                cc = x;
-
             end = x;
+
+            if (!cc)
+                cc = end;
         }
 
         tfree(buffer);