Fix build on macOS

A previous commit accidentally renamed platformInfo field in a DSI
struct field access to platform_info. It was only intended to rename the
platformInfo local variable to fit in with the naming scheme.

gl-natives/src/main/c/jaggl.c

@@ -1090,7 +1090,7 @@ JNIEXPORT jboolean JNICALL Java_jaggl_context_choosePixelFormat1(JNIEnv *env, jc
 
 	result = JNI_TRUE;
 #elif defined(__APPLE__) && defined(__MACH__)
-	if (!dsi->platform_info) {
+	if (!dsi->platformInfo) {
 		goto dsi_free;
 	}