oops, dropped im__value()

libvips/arithmetic/im_stats.c

@@ -136,6 +136,23 @@ im__wrapscan( VipsImage *in,
 		&wrapscan, NULL ) );
 }
 
+/* Get the value of pixel (0, 0). Use this to init the min/max value for
+ *  * im_max()/im_stats()/etc. 
+ *   */
+int
+im__value( IMAGE *im, double *value )
+{
+	IMAGE *t;
+
+	if( !(t = im_open_local( im, "im__value", "p" )) ||
+		im_extract_areabands( im, t, 0, 0, 1, 1, 0, 1 ) ||
+		im_avg( t, value ) )
+		return( -1 );
+
+	return( 0 );
+}
+
+
 /* Track min/max/sum/sum-of-squares for each thread during a scan.
  */
 static void *