corrected symbol export

Author: czurnieden

mp_printf_extension_init.c

@@ -6,13 +6,13 @@
 #if (!(defined(_MSC_VER)) &&  !(defined(MP_NO_FILE)) && (defined(GLIBC_VERSION)) && (GLIBC_VERSION > 2009) )
 #include <printf.h>
 
-int modZ = -1;
-int modM = -1;
-int modN = -1;
+static int modZ = -1;
+static int modM = -1;
+static int modN = -1;
 
 /* Size of mp_digit at base 2 rounded up */
 #define MP_LIMB_BUFSIZ 64
-int s_mp_print_mp_int(FILE *stream,  const struct printf_info *info,  const void *const *args)
+static int s_mp_print_mp_int(FILE *stream,  const struct printf_info *info,  const void *const *args)
 {
    mp_err err = MP_OKAY;