Remove 2 DAT restriction on everything excpet AB

DATabase/MergeDiff.cs

@@ -75,9 +75,9 @@ namespace SabreTools
 		public bool Process()
 		{
 			// Check if there are enough inputs
-			if (_inputs.Count < 2)
+			if ((!_ad && _inputs.Count < 1) || (_ad && _inputs.Count < 2))
 			{
-				_logger.Warning("At least 2 inputs are required!");
+				_logger.Warning("At least " + (_ad ? "2" : "1") + " input(s) are required!");
 				return false;
 			}
 
@@ -144,7 +144,7 @@ namespace SabreTools
 			}
 
 			// Sort the file by names for ease
-			RomManipulation.Sort(A, false);
+			RomManipulation.Sort(A, true);
 
 			// Now write the file out
 			Output.WriteToDat(_name, _desc, _version, _date, _cat, _author, _forceunpack, _old, "", A, _logger);

SabreHelper/Build.cs

@@ -117,7 +117,7 @@ Options:
   -l, --log		Enable logging of program output
   -lso, --list-sources	List all sources (id <= name)
   -lsy, --list-systems	List all systems (id <= name)
-  -m, --merge		Merge two or more DATs
+  -m, --merge		Merge one or more DATs
 	-ad, --all-diff	Enable output of all diff variants (2 DATs only)
 	-di, --diff		Switch to diffdat mode
 	-dd, --dedup		Enable deduping in the created DAT