Use more TRUNCF_BINANG for f32 -> s16 casts (#1503)

* TRUNCF_BINANG

* brackets

* extra cast

src/code/z_quake.c

@@ -184,7 +184,7 @@ QuakeRequest* Quake_RequestImpl(Camera* camera, u32 type) {
 
     // Add a unique random identifier to the upper bits of the index
     // The `~3` assumes there are only 4 requests
-    req->index = index + ((s16)(Rand_ZeroOne() * 0x10000) & ~3);
+    req->index = index + (TRUNCF_BINANG(Rand_ZeroOne() * 0x10000) & ~3);
 
     sQuakeRequestCount++;