Close an SMD ROM's file once, and report the version this core is built from (#71)

* Close an SMD ROM's file once, not twice

Upstream d22b34e78040, "Fix regression in SMD ROM loading", and it is a
real one here too: load_smd_rom() closes the handle itself at its end, and
load_media() then closed the same handle again in the tail both paths
share. Every .smd ROM went through that, and .smd is in the core's
valid_extensions.

The close moves into the branch that still has the file open, which is
what upstream did, so each path closes exactly once.

* Report the version this core is actually built from

The core told the frontend 0.6.3-pre. Upstream cut 1.0.0 - Mega CD, 32X,
Pico, Game Gear, SC-3000, Colecovision, the Nuklear UI rework, all of it -
and its tip is 1.0.1-pre, so this tree carries that work under a version
string from two releases ago. A user reading "BlastEm 0.6.3-pre" in the
core information screen has no way to tell which of those systems the core
is even supposed to run.

DM noticed it. Nothing else to take from that report: the 32X BIOS paths
he mentioned are already here, with the laseractive and TMSS ones beside
them, and upstream has only now caught up with that.

system.c

@@ -293,6 +293,10 @@ uint32_t load_media(char * filename, system_media *dst, system_type *stype)
 		} while (read > 0);
 		dst->buffer = buf;
 		ret = (uint32_t)readsize;
+		// Only this path still has the file open: load_smd_rom() above closes
+		// it itself, and closing it again below was a second close of the same
+		// handle for every .smd ROM. Upstream d22b34e78040.
+		romclose(f);
 	}
 	dst->dir = path_dirname(filename);
 	if (!dst->dir) {
@@ -301,7 +305,6 @@ uint32_t load_media(char * filename, system_media *dst, system_type *stype)
 	dst->name = basename_no_extension(filename);
 	dst->extension = ext;
 	dst->size = ret;
-	romclose(f);
 	if (!strcasecmp(dst->extension, "cue")) {
 		if (parse_cue(dst)) {
 			ret = dst->size;

version.inc

@@ -1 +1 @@
-#define BLASTEM_VERSION "0.6.3-pre"
+#define BLASTEM_VERSION "1.0.1-pre"