Don't clobber startup message w/ err opening file

When we opened a file with an unrecognized extension, this was reported
as the same type of failure as if you had specified a file that didn't
exist. The "this is a new file" message clobbered the "failed to read
this file" message.

Fixes #250

1 files changed, 8 insertions, 1 deletions

diff --git a/src/file.h b/src/file.h
index b681542..b0cf532 100644
--- a/src/file.h
+++ b/src/file.h
@@ -53,7 +53,14 @@ void write_fd(register FILE *f, int r0, int c0, int rn, int cn);
 void write_cells(register FILE *f, int r0, int c0, int rn, int cn, int dr, int dc);
 void write_marks(register FILE *f);
 void write_franges(register FILE *f);
-int readfile(char *fname, int eraseflg);
+
+typedef enum {
+    SC_READFILE_ERROR = 0,
+    SC_READFILE_SUCCESS = 1,
+    SC_READFILE_DOESNTEXIST = 2
+} sc_readfile_result;
+sc_readfile_result readfile(char *fname, int eraseflg);
+
 int file_exists(const char * fname);
 char * findhome(char *path);
 int backup_file(char *path);