avoid variable shadowing

jni/OpenAL/Alc/audiotrack.c

@@ -64,8 +64,7 @@ static void* thread_function(void* arg)
 {
     ALCdevice* device = (ALCdevice*)arg;
     AndroidData* data = (AndroidData*)device->ExtraData;
-
-    JNIEnv* env;
+    
     (*javaVM)->AttachCurrentThread(javaVM, &env, NULL);
 
     (*env)->PushLocalFrame(env, 2);

jni/OpenAL/OpenAL32/alBuffer.c

@@ -389,7 +389,6 @@ AL_API ALvoid AL_APIENTRY alBufferSubDataSOFT(ALuint buffer,ALenum format,const
 
     if(Context->SampleSource)
     {
-        ALintptrEXT offset;
 
         if(Context->SampleSource->state == MAPPED)
         {