Fix rotations on optimization builds

I have literally zero idea why this broke. Optimizations are wild.

include/SSystem/SComponent/c_angle.h

@@ -10,7 +10,11 @@
 #define S2RAD_CONSTANT (M_PI / 0x8000)
 #define RAD2S_CONSTANT (0x8000 / M_PI)
 
+#if TARGET_PC
+#define DEG2S(x) cAngle_degreeToS16((x))
+#else
 #define DEG2S(x) ((s16)((x) * DEG2S_CONSTANT))
+#endif
 #define S2DEG(x) ((x) * S2DEG_CONSTANT)
 #define S2RAD(x) ((x) * S2RAD_CONSTANT)
 #define RAD2S(x) ((x) * RAD2S_CONSTANT)

include/SSystem/SComponent/c_math.h

@@ -2,6 +2,9 @@
 #define C_MATH_H
 
 #include "JSystem/JMath/JMATrigonometric.h"
+#if TARGET_PC
+#include "angle_utils.h"
+#endif
 
 #ifndef __MWERKS__
 #include <limits>
@@ -32,7 +35,11 @@ inline f32 cM_ssin(s16 x) {
 }
 
 inline s16 cM_deg2s(f32 deg) {
+#if TARGET_PC
+    return cAngle_degreeToS16(deg);
+#else
     return deg * 182.04445f;
+#endif
 }
 
 inline s16 i_cM_deg2s(f32 deg) {

include/angle_utils.h

@@ -85,4 +85,15 @@
 #define ANGLE_SUB_2  S16_SUB_2
 #define ANGLE_MULT_2 S16_MULT_2
 
+#if TARGET_PC
+static inline s16 cAngle_degreeToS16(f32 deg) {
+    s32 angle = (s32)(deg * (0x8000 / 180.0f));
+    angle &= 0xFFFF;
+    if (angle >= 0x8000) {
+        angle -= 0x10000;
+    }
+    return (s16)angle;
+}
+#endif
+
 #endif // !_ANGLE_UTILS_H_