FM: Fix static analysis issue

Change-Id: Iac42f8f4f1f90c2c5860d90068e09d01638bff80
diff --git a/jni/android_hardware_fm.cpp b/jni/android_hardware_fm.cpp
index 0a5abbd..3846589 100644
--- a/jni/android_hardware_fm.cpp
+++ b/jni/android_hardware_fm.cpp
@@ -634,6 +634,7 @@
        snprintf(versionStr, sizeof(versionStr), "%d", cap.version);
        property_set("hw.fm.version", versionStr);
     } else {
+       close(fd);
        return FM_JNI_FAILURE;
     }