swars: Remove some misleading error messages from log

Some file not found messages did not really ment any error.
Now there is less of them.

Author: mefistotelis

src/game_data.c

@@ -277,7 +277,7 @@ void get_user_settings_fname(char *fname, const char *name)
     PathInfo *pinfo;
 
     pinfo = &game_dirs[DirPlace_Savegame];
-    if (strlen(name) == 0)
+    if (name[0] == '\0')
         name = "default";
     sprintf(fname, "%s/%.8s.ini", pinfo->directory, name);
     LbStringToLower(fname+strlen(pinfo->directory));

src/game_save.c

@@ -264,9 +264,13 @@ void read_user_settings(void)
     int i;
 
     read_mortal_salt_backup = false;
+    fh = INVALID_FILE;
     get_user_settings_fname(fname, login_name);
+    if (login_name[0] == '\0')
+        read_mortal_salt_backup = true;
 
-    fh = LbFileOpen(fname, Lb_FILE_MODE_READ_ONLY);
+    if (LbFileExists(fname))
+        fh = LbFileOpen(fname, Lb_FILE_MODE_READ_ONLY);
 
     // Try default settings file instead
     if ((fh == INVALID_FILE) && (strlen(login_name) > 0))

src/lvfiles.c

@@ -1428,11 +1428,15 @@ void load_map_bnb(ushort mapno)
     ubyte Amin, Amax;
     ubyte Bmin, Bmax;
 
+    fh = INVALID_FILE;
     pinfo = &game_dirs[DirPlace_Maps];
     snprintf(locstr, DISKPATH_SIZE-1, "%s/map%03d.b&b", pinfo->directory, mapno);
-    fh = LbFileOpen(locstr, Lb_FILE_MODE_READ_ONLY);
+    if (LbFileExists(locstr))
+        fh = LbFileOpen(locstr, Lb_FILE_MODE_READ_ONLY);
+
     if (fh == INVALID_FILE)
     {
+        LOGSYNC("Using defaults in place of '%s' file", locstr);
         map_bnb.field_0 = 0;
         map_bnb.field_1 = 0;
         map_bnb.field_2 = 0;