Fix crosses initialization of 'long int size'
Fix crosses initialization of 'long int size'

.../minimp3_ex.h: In function 'int mp3dec_open_file(const char*, mp3dec_map_info_t*)':
.../minimp3_ex.h:329:1: error: jump to label 'error' [-fpermissive]
.../minimp3_ex.h:315:14: error:   from here [-fpermissive]
.../minimp3_ex.h:316:10: error:   crosses initialization of 'long int size'

lieff/minimp3,lieff/minimp3,lieff/minimp3