Fix MIDI import setting pitch of all notes to +1

The MIDI import code was passing a `true` parameter as the note pitch, which should be the value for something else. Since true = 1, all notes generated by it were receiving that pitch.

Also fixed descriptions of some functions missing parameters.

Discovered while testing #108

Author: Bentroen

scripts/add_block/add_block.gml

@@ -1,4 +1,4 @@
-// add_block(x, y, ins, key, vel, pan, [insnum])
+// add_block(x, y, ins, key, vel, pan, pit, [insnum])
 var a, b, c, xx, yy, ins, key, vel, pan, pit, insnum;
 xx = argument[0]
 yy = argument[1]

scripts/add_block_select/add_block_select.gml

@@ -1,4 +1,4 @@
-// add_block_select(x, y, ins, key, vel, pan)
+// add_block_select(x, y, ins, key, vel, pan, pit)
 var a, b, c, xx, yy, ins, key, vel, pan, pit;
 xx = argument0
 yy = argument1

scripts/import_midi/import_midi.gml

@@ -130,7 +130,7 @@ for (t = 0; t < midi_tracks; t += 1) {
             // Add block, go lower if failed
             a = 0
             while (1) {
-                if (add_block(pos, yy, instrument_list[| ins], note, vel, 100, true)) break
+                if (add_block(pos, yy, instrument_list[| ins], note, vel, 100, 0, true)) break
                 yy += 1
                 a += 1
                 if (a >= w_midi_maxheight && w_midi_maxheight < 20) break

scripts/open_schematic/open_schematic.gml

@@ -444,7 +444,7 @@ with (new(obj_dummy)) {
                     if (debugstr) str += chr(13) + chr(10) + "Added note block no. " + string(queuenoteblocks) + "!"
                     with (obj_controller) {
                         d = sqrt(2000 * 256 * 2000)
-                        while (!add_block(start + cd, b, instrument_list[| a], c)) b += 1
+                        while (!add_block(start + cd, b, instrument_list[| a], c, 100, 100, 0)) b += 1
                     }
                     break
                 }