rename hid_init() to hidapi_hid_init() to avoid collision with usbhid

Index: hidtest/test.c
--- hidtest/test.c.orig
+++ hidtest/test.c
@@ -93,12 +93,12 @@ int main(int argc, char* argv[])
 		printf("Compile-time version is different than runtime version of hidapi.\n]n");
 	}
 
-	if (hid_init())
+	if (hidapi_hid_init())
 		return -1;
 
 #if defined(__APPLE__) && HID_API_VERSION >= HID_API_MAKE_VERSION(0, 12, 0)
-	// To work properly needs to be called before hid_open/hid_open_path after hid_init.
-	// Best/recommended option - call it right after hid_init.
+	// To work properly needs to be called before hid_open/hid_open_path after hidapi_hid_init.
+	// Best/recommended option - call it right after hidapi_hid_init.
 	hid_darwin_set_open_exclusive(0);
 #endif