Fix init

Makefile

@@ -9,5 +9,6 @@ target/sourmash.h: src/lib.rs src/ffi.rs src/errors.rs
 	-rm -rf ${tempdir}
 
 wasm:
-	wasm-pack init
+	wasm-pack init --mode no-installs
+
 .phony: test

src/wasm.rs

@@ -16,9 +16,9 @@ impl KmerMinHash {
         scaled: u32,
         track_abundance: bool,
     ) -> KmerMinHash {
-        if scaled == 0 {
-        }
-        let max_hash = if scaled == 0 {
+        let max_hash = if num != 0 {
+            0
+        } else if scaled == 0 {
             u64::max_value()
         } else {
             u64::max_value() / scaled as u64
@@ -28,8 +28,13 @@ impl KmerMinHash {
     }
 
     #[wasm_bindgen]
-    pub fn add_sequence_js(&mut self, buf: &[u8]) {
-        self.add_sequence(buf, true);
+    pub fn add_sequence_js(&mut self, buf: &str) {
+        self.add_sequence(buf.as_bytes(), true);
+    }
+
+    #[wasm_bindgen]
+    pub fn add_hash_js(&mut self, h: u64) {
+        self.add_hash(h);
     }
 
     #[wasm_bindgen]