swresample-test: make it independant of the internal SWR_CH_MAX

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libswresample/swresample-test.c

@@ -31,6 +31,8 @@
 
 #define SAMPLES 1000
 
+#define SWR_CH_MAX 32
+
 #define ASSERT_LEVEL 2
 
 static double get(uint8_t *a[], int ch, int index, int ch_count, enum AVSampleFormat f){