[Tuner] ADD trap of overflow on tuning.

diff --git a/akc6955.c b/akc6955.c
index 0a43c40..97c29eb 100644 (file)
--- a/akc6955.c
+++ b/akc6955.c
@@ -113,6 +113,8 @@ unsigned int akc6955_set_tune(unsigned char mode_3k, unsigned int ch)
         // BAND=AM && MW2
         i = (i / 3) * 3;
     }
+    if(i < 0) i = 0;
+    if(i > 0x1fff) i = 0x1fff;
     if(mode_3k == 0){
         b = ((i >> 8) & 0x1f) | 0x40; // 32.768KHz clock
     } else {