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Fix IT reader for unusually large numbers of components.

--- a/src/it/itread.c

+++ b/src/it/itread.c

@@ -943,6 +943,7 @@

 	int message_length, message_offset;

 	IT_COMPONENT *component;

+	int min_components;

 	int n_components = 0;

 	unsigned char sample_convert[4096];

@@ -1049,8 +1050,10 @@

     dumbfile_getnc((char *)sigdata->order, sigdata->n_orders, f);

 	sigdata->restart_position = 0;

+    

+	min_components = (special & 1) + sigdata->n_instruments + sigdata->n_samples + sigdata->n_patterns;

-	component = malloc(769 * sizeof(*component));

+	component = malloc(min_components * sizeof(*component));

 	if (!component) {

 		_dumb_it_unload_sigdata(sigdata);

 		return NULL;