fix(faster-whisper): cast segment timestamps to int after multiplication (#9674)

`int(x) * 1e9` returns a float because `1e9` is a float literal, but
TranscriptSegment.start/end are integer protobuf fields. This caused
every transcription request to fail with:

  TypeError: 'float' object cannot be interpreted as an integer

Multiply first, then cast — `int(x * 1e9)` — to get an int as required.

Author: arteven

backend/python/faster-whisper/backend.py

@@ -59,7 +59,7 @@ def AudioTranscription(self, request, context):
             id = 0
             for segment in segments:
                 print("[%.2fs -> %.2fs] %s" % (segment.start, segment.end, segment.text))
-                resultSegments.append(backend_pb2.TranscriptSegment(id=id, start=int(segment.start)*1e9, end=int(segment.end)*1e9, text=segment.text))
+                resultSegments.append(backend_pb2.TranscriptSegment(id=id, start=int(segment.start*1e9), end=int(segment.end*1e9), text=segment.text))
                 text += segment.text
                 id += 1
         except Exception as err: