chore(verify): collapse MemorySection match guard (clippy::collapsible_match)

Fold the inner `if reader.count() > 0` into the match-arm guard in
verify_from_module's L13 module-isolation pass. Pure cleanup, no behaviour
change. Clears the one pre-existing clippy warning flagged and deferred during
the Tier-2 work; `cargo clippy -p typed-wasm-verify --all-features --all-targets`
is now clean. 77 verify unit tests + cross-compat green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

crates/typed-wasm-verify/src/verify.rs

@@ -320,10 +320,8 @@ pub fn verify_from_module(wasm_bytes: &[u8]) -> Result<(), VerifyError> {
                     }
                 }
             }
-            Payload::MemorySection(reader) => {
-                if reader.count() > 0 {
-                    has_own_memory = true;
-                }
+            Payload::MemorySection(reader) if reader.count() > 0 => {
+                has_own_memory = true;
             }
             Payload::CustomSection(reader) if reader.name() == OWNERSHIP_SECTION_NAME => {
                 ownership_payload = Some(reader.data().to_vec());