Merge branch '8.10'

ChangeLog

@@ -26,6 +26,7 @@
 - fix msb_first default in ppm load and save [ewelot]
 - force binary mode on win for connection read / write [Alreiber]
 - better testing for output to target [barryspearce]
+- ppmload_source was missing is_a [ewelot]
 
 6/9/20 started 8.10.2
 - update magicksave/load profile handling [kelilevi]

libvips/foreign/heifload.c

@@ -267,7 +267,7 @@ static const char *heif_magic[] = {
 	"ftypavif"	/* AV1 image format */
 };
 
-/* THe API has:
+/* The API has:
  *
  *	enum heif_filetype_result result = heif_check_filetype( buf, 12 );
  *

libvips/foreign/ppmload.c

@@ -786,6 +786,7 @@ vips_foreign_load_ppm_source_class_init( VipsForeignLoadPpmFileClass *class )
 {
 	GObjectClass *gobject_class = G_OBJECT_CLASS( class );
 	VipsObjectClass *object_class = (VipsObjectClass *) class;
+	VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
 
 	gobject_class->set_property = vips_object_set_property;
 	gobject_class->get_property = vips_object_get_property;
@@ -793,6 +794,8 @@ vips_foreign_load_ppm_source_class_init( VipsForeignLoadPpmFileClass *class )
 	object_class->nickname = "ppmload_source";
 	object_class->build = vips_foreign_load_ppm_source_build;
 
+	load_class->is_a_source = vips_foreign_load_ppm_is_a_source;
+
 	VIPS_ARG_OBJECT( class, "source", 1,
 		_( "Source" ),
 		_( "Source to load from" ),

libvips/iofuncs/sourcecustom.c

@@ -175,7 +175,7 @@ vips_source_custom_class_init( VipsSourceCustomClass *class )
 	 *
 	 * This signal is emitted to read bytes from the source into @buffer.
 	 *
-	 * Returns: the number of bytes read.
+	 * Returns: the number of bytes read. Return 0 for EOF.
 	 */
 	vips_source_custom_signals[SIG_READ] = g_signal_new( "read",
 		G_TYPE_FROM_CLASS( class ),
@@ -229,7 +229,8 @@ vips_source_custom_new( void )
 
 	VIPS_DEBUG_MSG( "vips_source_custom_new:\n" );
 
-	source_custom = VIPS_SOURCE_CUSTOM( g_object_new( VIPS_TYPE_SOURCE_CUSTOM, NULL ) );
+	source_custom = VIPS_SOURCE_CUSTOM(
+		g_object_new( VIPS_TYPE_SOURCE_CUSTOM, NULL ) );
 
 	if( vips_object_build( VIPS_OBJECT( source_custom ) ) ) {
 		VIPS_UNREF( source_custom );