Deprecate AngleMod

It's a duplicate for AngleNormalize360, and the later is better
documented. Let's keep only one.

Author: Antoine Fontaine

src/engine/qcommon/q_math.cpp

@@ -634,9 +634,9 @@ void AnglesSubtract( vec3_t v1, vec3_t v2, vec3_t v3 )
 	v3[ 2 ] = AngleSubtract( v1[ 2 ], v2[ 2 ] );
 }
 
-float AngleMod( float a )
+DEPRECATED float AngleMod( float a )
 {
-	return ( ( 360.0f / 65536 ) * ( ( int )( a * ( 65536 / 360.0f ) ) & 65535 ) );
+	return AngleNormalize360( a );
 }
 
 /*

src/engine/qcommon/q_shared.h

@@ -759,7 +759,7 @@ inline vec_t VectorNormalize2( const vec3_t v, vec3_t out )
 	void  SetPlaneSignbits( struct cplane_t *out );
 	int   BoxOnPlaneSide( const vec3_t emins, const vec3_t emaxs, const struct cplane_t *plane );
 
-	float AngleMod( float a );
+	DEPRECATED float AngleMod( float a );
 	float LerpAngle( float from, float to, float frac );
 	float AngleSubtract( float a1, float a2 );
 	void  AnglesSubtract( vec3_t v1, vec3_t v2, vec3_t v3 );