[core] scan-build: switch_agc_feed() - Division by zero

src/switch_resample.c

@@ -522,7 +522,9 @@ SWITCH_DECLARE(switch_status_t) switch_agc_feed(switch_agc_t *agc, int16_t *data
 			energy += abs(data[i]);
 		}
 
-		agc->score = energy / samples * channels;
+		if (samples) { 
+			agc->score = energy / samples * channels;
+		}
 		agc->score_sum += agc->score;
 		agc->score_count++;