updated to latest SDL2 (f9244b2a151)

jni/SDL2-2.0.3/src/libm/k_rem_pio2.c

@@ -134,6 +134,8 @@ static const char rcsid[] =
 #include "math_libm.h"
 #include "math_private.h"
 
+#include "SDL_assert.h"
+
 libm_hidden_proto(scalbn)
     libm_hidden_proto(floor)
 #ifdef __STDC__
@@ -181,10 +183,13 @@ __kernel_rem_pio2(x, y, e0, nx, prec, ipio2)
     double z, fw, f[20], fq[20], q[20];
 
     /* initialize jk */
+    SDL_assert((prec >= 0) && (prec < SDL_arraysize(init_jk)));
     jk = init_jk[prec];
+    SDL_assert((jk >= 2) && (jk <= 6));
     jp = jk;
 
     /* determine jx,jv,q0, note that 3>q0 */
+    SDL_assert(nx > 0);
     jx = nx - 1;
     jv = (e0 - 3) / 24;
     if (jv < 0)

jni/SDL2-2.0.3/src/libm/math_libm.h

@@ -33,5 +33,6 @@ double SDL_uclibc_pow(double x, double y);
 double SDL_uclibc_scalbn(double x, int n);
 double SDL_uclibc_sin(double x);
 double SDL_uclibc_sqrt(double x);
+double SDL_uclibc_tan(double x);
 
 /* vi: set ts=4 sw=4 expandtab: */

jni/SDL2-2.0.3/src/libm/math_private.h

@@ -40,6 +40,7 @@ typedef unsigned int u_int32_t;
 #define scalbn          SDL_uclibc_scalbn
 #define sin             SDL_uclibc_sin
 #define __ieee754_sqrt  SDL_uclibc_sqrt
+#define tan             SDL_uclibc_tan
 
 /* The original fdlibm code used statements like:
 	n0 = ((*(int*)&one)>>29)^1;		* index of high word *