coding: Correctly count bits when decoding EDGE bursts with MCS >= 7.

They consist of two blocks, so we should count both blocks.

Change-Id: I560de192212dae4705054a1665726369b83d213a
diff --git a/src/coding/gsm0503_coding.c b/src/coding/gsm0503_coding.c
index c72aabc..088b8bb 100644
--- a/src/coding/gsm0503_coding.c
+++ b/src/coding/gsm0503_coding.c
@@ -979,6 +979,9 @@
 		if (rc < 0)
 			return -EFAULT;
 	} else {
+		/* Bit counters for the second block */
+		int n_errors2, n_bits_total2;
+
 		/* MCS-7,8,9 block 1 */
 		rc = egprs_decode_data(l2_data, c1, cps.mcs, cps.p[0],
 			0, n_errors, n_bits_total);
@@ -987,7 +990,11 @@
 
 		/* MCS-7,8,9 block 2 */
 		rc = egprs_decode_data(l2_data, c2, cps.mcs, cps.p[1],
-			1, n_errors, n_bits_total);
+			1, &n_errors2, &n_bits_total2);
+		if (n_errors)
+			*n_errors += n_errors2;
+		if (n_bits_total)
+			*n_bits_total += n_bits_total2;
 		if (rc < 0)
 			return -EFAULT;
 	}