Fix memset() bugs

Change-Id: Icf4341c0a62e782cf8c2a863408591df4e6f07cb
diff --git a/native/jni/src/proximity_info.cpp b/native/jni/src/proximity_info.cpp
index 2633913..18a0b74 100644
--- a/native/jni/src/proximity_info.cpp
+++ b/native/jni/src/proximity_info.cpp
@@ -34,7 +34,7 @@
     if (jArray && buffer) {
         env->GetIntArrayRegion(jArray, 0, len, buffer);
     } else if (buffer) {
-        memset(buffer, 0, len);
+        memset(buffer, 0, len * sizeof(jint));
     }
 }
 
@@ -43,7 +43,7 @@
     if (jArray && buffer) {
         env->GetFloatArrayRegion(jArray, 0, len, buffer);
     } else if (buffer) {
-        memset(buffer, 0, len);
+        memset(buffer, 0, len * sizeof(jfloat));
     }
 }