[PD] syncgrain troubles on MacOS X

[Hans-Christoph Steiner]

I have compiled flext and [syncgrain~] against Pd 0.37-1 and  
[syncgrain~] is running on MacOS X, but I am having troubles with it.   
Most of the time when I try to set the array, I get this error:

*** malloc[1548]: Deallocation of a pointer not malloced: 0x113cd94;  
This could be a double free(), or free() called with the middle of an  
allocated block; Try setting environment variable MallocHelp to see  
tools to help debug

The array exists and has data it in when I send the [set( message.  The  
error is triggered only when the DSP is on.

My patch is attached at the end.

.hc
________________________________________________________________________ 
____

Using ReBirth is like trying to play an 808 with a long stick.
								-David Zicarelli

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#N canvas 293 198 758 548 10;
#X obj 66 260 syncgrain~;
#X floatatom 80 102 5 0 0 1 - - -;
#X floatatom 91 125 5 0 0 1 - - -;
#X floatatom 106 148 5 0 0 1 - - -;
#X floatatom 118 171 5 0 0 1 - - -;
#X floatatom 132 192 5 0 0 1 - - -;
#X text 131 341 The sound source for the grains is obtained by reading
from an array containing the source waveform. The grain generator has
full control of frequency (grains/sec) \, overall amplitude \, grain
pitch (a sampling increment) and grain size (in millisecs). An extra
parameter is the grain pointer speed (or rate) \, which controls which
position the generator will start reading samples in the table for
each successive grain. It is measured in fractions of grain size \,
so a value of 1 will make each successive grain read from where the
previous grain should finish. A value of 0.5 will make the next grain
start at the midway position from the previous grain start and finish
\, etc. A value of 0 will make the generator read always from the start
of the table. This control gives extra flexibility for creating 
timescale
modifications in the resynthesis.;
#N canvas 0 22 454 304 graph1 0;
#X array source_array 175807 float 0;
#X coords 0 1 175806 -1 200 140 1;
#X restore 505 56 graph;
#X msg 29 18 help;
#X msg 65 47 set source_array;
#X obj 175 190 hsl 150 17 0.012 1.2 1 0 empty empty PointerRate_(0-1)
5 9 1 11 -262144 -1 -1 0 0;
#X obj 162 168 hsl 150 17 10 100 0 0 empty empty GrainSize 5 9 1 11
-262144 -1 -1 0 0;
#X obj 149 146 hsl 150 17 0 500 0 0 empty empty GrainPitch 5 9 1 11
-262144 -1 -1 0 0;
#X obj 135 123 hsl 150 17 0 1.2 0 0 empty empty Amplitude 5 9 1 11
-262144 -1 -1 0 0;
#X obj 124 100 hsl 150 17 1 1000 1 0 empty empty 
GrainFrequency_(per_sec)
5 9 1 11 -262144 -1 -1 0 0;
#X obj 529 261 openpanel;
#X msg 530 280 read -resize \$1 source_array;
#X obj 530 305 soundfiler;
#X obj 529 230 bng 25 250 50 0 empty empty empty 0 -6 0 8 -155622 -1
-1;
#X obj 67 306 *~;
#X obj 87 285 hsl 150 17 0 1.2 0 0 empty empty master_amp 5 9 1 11
-262144 -1 -1 0 0;
#X obj 55 341 dac~;
#X obj 290 266 print SYNCGRAIN;
#X obj 376 29 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 0 1
;
#X msg 376 49 \; pd dsp \$1;
#X connect 0 0 19 0;
#X connect 0 1 22 0;
#X connect 1 0 0 1;
#X connect 2 0 0 2;
#X connect 3 0 0 3;
#X connect 4 0 0 4;
#X connect 5 0 0 5;
#X connect 8 0 0 0;
#X connect 9 0 0 0;
#X connect 10 0 5 0;
#X connect 11 0 4 0;
#X connect 12 0 3 0;
#X connect 13 0 2 0;
#X connect 14 0 1 0;
#X connect 15 0 16 0;
#X connect 16 0 17 0;
#X connect 18 0 15 0;
#X connect 19 0 21 0;
#X connect 19 0 21 1;
#X connect 20 0 19 1;
#X connect 23 0 24 0;
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