Fix black-screen video on unaligned widths (swscale row padding)

swscale aligns the RGBA linesize to a SIMD boundary, so any video whose
width*4 isn't a multiple of the alignment (e.g. 1674-wide → 6720 B/row vs
6696) yields a padded plane larger than width*height*4. The old copy path
tripped a `need > expected → skip` guard and dropped every video frame,
leaving a black screen while audio (independent path) still played.

Read Frame.imageStride and strip the row padding with a row-by-row memCopy
into a tightly-packed slot (width*height*4), matching the texture's expected
size. Falls back to deriving the stride from buffer size when the field is
absent. Single-shot memCopy retained when stride == rowBytes (aligned widths).

Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>

gradle.properties

@@ -5,7 +5,7 @@ org.gradle.configuration-cache=false
 
 # Mod
 mod_id=video_player
-mod_version=0.4.32
+mod_version=0.4.33
 maven_group=com.ejclaw.videoplayer
 archives_base_name=video_player