opengl: Check whether full_width matches the pitch

This is the actual width used in the upload calls if the check
matched, so this is the width we should check for.
Signed-off-by: Martin Storsjö <martin@martin.st>

modules/video_output/opengl.c

@@ -714,7 +714,7 @@ static void Upload(vout_display_opengl_t *vgl, int in_width, int in_height,
     // This unpack alignment is the default, but setting it just in case.
     glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
 #ifndef GL_UNPACK_ROW_LENGTH
-    if ( pitch != ALIGN(width * pixel_pitch, 4) )
+    if ( pitch != ALIGN(full_width * pixel_pitch, 4) )
     {
         int dst_width = full_upload ? full_width : width;
         int dst_pitch = ALIGN(dst_width * pixel_pitch, 4);