ISSigTool: Compare "file-name" case-sensitively on the "signature unchanged" check.

Projects/ISSigTool.dpr

@@ -185,15 +185,17 @@ begin
     the same key produces a totally different signature each time. To avoid
     unnecessary alterations to the "sig-r" and "sig-s" values when a file is
     being re-signed but its contents haven't changed, we attempt to load and
-    verify the existing .issig file. If the key, file size, and file hash are
-    all up to date, then we skip creation of a new .issig file. }
+    verify the existing .issig file. If the existing values exactly match
+    what we would have written, then we skip creation of a new .issig file.
+    Note that "file-name" is compared case-sensitively here because we don't
+    want to impede the user's ability to correct case mistakes. }
   var ExistingFileName: String;
   var ExistingFileSize: Int64;
   var ExistingFileHash: TSHA256Digest;
   const Verified = ISSigVerifySignature(AFilename, [AKey],
     ExistingFileName, ExistingFileSize, ExistingFileHash, nil, nil, nil);
 
-  if Verified and PathSame(FileName, ExistingFileName) and (FileSize = ExistingFileSize) and
+  if Verified and (FileName = ExistingFileName) and (FileSize = ExistingFileSize) and
      SHA256DigestsEqual(FileHash, ExistingFileHash) then begin
     PrintUnlessQuiet('signature unchanged');
     Exit;