Get jar_mod and jar_xm compiling with MSVC.

extras/jar_mod.h

@@ -1524,7 +1524,12 @@ mulong jar_mod_load_file(jar_mod_context_t * modctx, const char* filename)
         modctx->modfile = 0;
     }
     
-    FILE *f = fopen(filename, "rb");
+    FILE *f = NULL;
+#if defined(_MSC_VER) && _MSC_VER >= 1500
+    fopen_s(&f, filename, "rb");
+#else
+    f = fopen(filename, "rb");
+#endif
     if(f)
     {
         fseek(f,0,SEEK_END);

extras/jar_xm.h

@@ -1439,7 +1439,7 @@ static void jar_xm_volume_slide(jar_xm_channel_context_t* ch, uint8_t rawval) {
     }
 }
 
-static float jar_xm_envelope_lerp(jar_xm_envelope_point_t* restrict a, jar_xm_envelope_point_t* restrict b, uint16_t pos) {
+static float jar_xm_envelope_lerp(jar_xm_envelope_point_t* a, jar_xm_envelope_point_t* b, uint16_t pos) {
     /* Linear interpolation between two envelope points */
     if(pos <= a->frame) return a->value;
     else if(pos >= b->frame) return b->value;
@@ -2606,7 +2606,12 @@ int jar_xm_create_context_from_file(jar_xm_context_t** ctx, uint32_t rate, const
     FILE* xmf;
     int size;
 
+#if defined(_MSC_VER) && _MSC_VER >= 1500
+    xmf = NULL;
+    fopen_s(&xmf, filename, "rb");
+#else
     xmf = fopen(filename, "rb");
+#endif
     if(xmf == NULL) {
         DEBUG_ERR("Could not open input file");
         *ctx = NULL;