decoding: remove superfluous double-semicolon

Change-Id: I48ec24f2e10620279cbcbf39c70a4be6438f6b0f
Reviewed-on: https://gerrit.osmocom.org/140
Reviewed-by: Harald Welte <laforge@gnumonks.org>
Tested-by: Jenkins Builder
diff --git a/src/decoding.cpp b/src/decoding.cpp
index 5f64ac0..2600879 100644
--- a/src/decoding.cpp
+++ b/src/decoding.cpp
@@ -267,7 +267,7 @@
 				 * so drop it (this may happen with EGPRS since
 				 * there is no M flag. */
 				num_chunks -= 1;
-				break;;
+				break;
 			}
 			chunks[i].length = data_len - offs;
 		}