Small fix of GCC warning in adlmidi_op3.cpp built without embedded banks

```
warning: extended initializer lists only available with -std=c++11 or -std=gnu++11
```

1 files changed, 2 insertions, 2 deletions

diff --git a/src/adlmidi_opl3.cpp b/src/adlmidi_opl3.cpp
index d03b942..316c8e1 100644
--- a/src/adlmidi_opl3.cpp
+++ b/src/adlmidi_opl3.cpp
@@ -28,9 +28,9 @@
     Dummy data which replaces adldata.cpp banks database
 */
 
-const struct adldata adl[]
+const struct adldata adl[] =
 {
-    {0, 0, 0, 0, 0, 0}
+    {0, 0, (unsigned char)'\0', (unsigned char)'\0', (unsigned char)'\0', 0}
 };
 
 const struct adlinsdata adlins[] =