Z2AudioLib work (#2339)

* Z2LinkMgr work, Z2AudioArcLoader matching

* Z2SeMgr matching

* Z2SpeechMgr2 almost done, Z2SoundHandles matching

include/JSystem/JMath/JMath.h

@@ -12,7 +12,7 @@ void JMAVECScaleAdd(register const Vec* vec1, register const Vec* vec2, register
                     register f32 scale);
 
 inline int JMAAbs(int value) {
-    return (value >> 0x1f ^ value) - (value >> 0x1f);
+    return value > 0 ? value : -value;
 }
 
 inline f32 JMAFastReciprocal(f32 value) {

include/JSystem/JMath/random.h

@@ -20,7 +20,7 @@ struct TRandom_fast_ {
 
     u32 get_bit32(void) { return this->get(); }
 
-    s8 get_uint8(u8 param_0) {
+    u8 get_uint8(u8 param_0) {
         return get_ufloat_1() * param_0;
     }