Trying to apply a file addition without existing file now throws an error.

Author: LeonBein

src/LBGit-Core.package/SquotFileListDiff.class/instance/createFile..st

@@ -3,6 +3,7 @@ createFile: aPath
 
 	| sourceReference targetReference |
 	sourceReference := self sourceReferenceOn: aPath.
-	sourceReference exists ifFalse: [^ self].
+	sourceReference exists 
+		ifFalse: [self error: 'Trying to apply a file addition of ''', aPath, ''' but file not existent in addition source'].
 	targetReference := self targetReferenceOn: aPath.
 	sourceReference copyTo: targetReference.

src/LBGit-Core.package/SquotFileListDiff.class/methodProperties.json

@@ -12,7 +12,7 @@
 		"asConflicts" : "LB 4/27/2019 15:49",
 		"asDiffTree" : "LB 4/28/2019 19:24",
 		"createDiffs" : "LB 11/23/2018 15:20",
-		"createFile:" : "LB 3/1/2019 15:57",
+		"createFile:" : "LB 5/5/2019 15:12",
 		"deleteFile:" : "LB 11/25/2018 15:55",
 		"diff:against:" : "LB 11/26/2018 16:06",
 		"diffAdded" : "LB 4/28/2019 16:09",