Fix examples.

examples/simple_capture.c

@@ -48,7 +48,7 @@ mal_uint32 on_send_frames(mal_device* pDevice, mal_uint32 frameCount, void* pSam
 int main()
 {
     mal_context context;
-    if (mal_context_init(NULL, 0, &context) != MAL_SUCCESS) {
+    if (mal_context_init(NULL, 0, NULL, &context) != MAL_SUCCESS) {
         printf("Failed to initialize context.");
         return -1;
     }

examples/simple_enumeration.c

@@ -12,7 +12,7 @@ int main(int argc, char** argv)
     (void)argv;
 
     mal_context context;
-    if (mal_context_init(NULL, 0, &context) != MAL_SUCCESS) {
+    if (mal_context_init(NULL, 0, NULL, &context) != MAL_SUCCESS) {
         printf("Failed to initialize context.");
         return -2;
     }

examples/simple_playback.c

@@ -31,7 +31,7 @@ int main(int argc, char** argv)
     }
 
     mal_context context;
-    if (mal_context_init(NULL, 0, &context) != MAL_SUCCESS) {
+    if (mal_context_init(NULL, 0, NULL, &context) != MAL_SUCCESS) {
         printf("Failed to initialize context.");
 		drwav_uninit(&wav);
         return -3;