Give a message when you don't succeed in writing a macro file.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8977 c06c8d41-db1a-0410-9941-cceddc491573

1 files changed, 8 insertions, 2 deletions

diff --git a/crawl-ref/source/macro.cc b/crawl-ref/source/macro.cc
index dd116d451d..c81dd4330c 100644
--- a/crawl-ref/source/macro.cc
+++ b/crawl-ref/source/macro.cc
@@ -597,10 +597,16 @@ static void write_map(std::ofstream &f, const macromap &mp, const char *key)
 /*
  * Saves macros into the macrofile, overwriting the old one.
  */
-void macro_save( void )
+void macro_save()
 {
     std::ofstream f;
-    f.open( get_macro_file().c_str() );
+    const std::string macrofile = get_macro_file();
+    f.open(macrofile.c_str());
+    if (!f)
+    {
+        mprf(MSGCH_ERROR, "Couldn't open %s for writing!", macrofile.c_str());
+        return;
+    }
 
     f << "# WARNING: This file is entirely auto-generated." << std::endl
       << std::endl << "# Key Mappings:" << std::endl;