fix: build warning

README.md

@@ -9,7 +9,7 @@ There are two variants of this project, OpenEUICC and EasyEUICC:
 | Privileged                    |         Must be installed as system app         |        No         |
 | Internal eSIM                 |                    Supported                    |    Unsupported    |
 | External (Removable) eSIM     |                    Supported                    |     Supported     |
-| USB Readers                   |                       Yes                       |        Yes        |
+| USB Readers                   |                    Supported                    |     Supported     |
 | Requires allowlisting by eSIM |                       No                        | Yes -- except USB |
 | System Integration            | Partial (carrier partner API unimplemented yet) |        No         |
 

libs/lpac-jni/src/main/jni/lpac-jni/interface-wrapper.c

@@ -80,7 +80,7 @@ apdu_interface_transmit(struct euicc_ctx *ctx, uint8_t **rx, uint32_t *rx_len, c
     LPAC_JNI_EXCEPTION_RETURN;
     *rx_len = (*env)->GetArrayLength(env, ret);
     *rx = calloc(*rx_len, sizeof(uint8_t));
-    (*env)->GetByteArrayRegion(env, ret, 0, *rx_len, *rx);
+    (*env)->GetByteArrayRegion(env, ret, 0, *rx_len, (jbyte *) *rx);
     (*env)->DeleteLocalRef(env, txArr);
     (*env)->DeleteLocalRef(env, ret);
     return 0;
@@ -113,7 +113,7 @@ http_interface_transmit(struct euicc_ctx *ctx, const char *url, uint32_t *rcode,
     jbyteArray rxArr = (jbyteArray) (*env)->GetObjectField(env, ret, field_resp_data);
     *rx_len = (*env)->GetArrayLength(env, rxArr);
     *rx = calloc(*rx_len, sizeof(uint8_t));
-    (*env)->GetByteArrayRegion(env, rxArr, 0, *rx_len, *rx);
+    (*env)->GetByteArrayRegion(env, rxArr, 0, *rx_len, (jbyte *) *rx);
     (*env)->DeleteLocalRef(env, txArr);
     (*env)->DeleteLocalRef(env, rxArr);
     (*env)->DeleteLocalRef(env, headersArr);