Don't prevent passing NULL to non-Objective-C pointer parameters.

The purpose for disallowing non-Objective-C pointer parameters is because there's no way to know how big a C pointer's underlying data is.  But if the pointer is NULL, then there's nothing to pass, so just pass NULL and don't throw an exception.

PiperOrigin-RevId: 382383417

Service/Sources/EDOInvocationMessage.m

@@ -279,9 +279,16 @@ + (instancetype)requestWithInvocation:(NSInvocation *)invocation
       value = objRef ? BOX_VALUE(*objRef, target, service, nil)
                      : [EDOBoxedValueType parameterForDoublePointerNullValue];
     } else if (EDO_IS_POINTER(ctype)) {
-      // TODO(haowoo): Add the proper error and/or exception handler.
-      NSAssert(NO, @"Not supported type (%s) in the argument for selector (%@).", ctype,
-               selector ? NSStringFromSelector(selector) : @"(block)");
+      void *objRef;
+      [invocation getArgument:&objRef atIndex:i];
+
+      // Don't assert if the pointer is NULL.
+      if (objRef != NULL) {
+        // TODO(haowoo): Add the proper error and/or exception handler.
+        NSAssert(NO, @"Not supported type (%s) in argument %@ for selector (%@).", ctype, @(i),
+                 selector ? NSStringFromSelector(selector) : @"(block)");
+      }
+      value = [NSNull null];
     } else {
       NSUInteger typeSize = 0L;
       NSGetSizeAndAlignment(ctype, &typeSize, NULL);