Prevent a file descriptor leak

Resolves: RHEL-44911

mtools-4.0.43-close.patch

@@ -0,0 +1,11 @@
+diff -ur mtools-4.0.44/mpartition.c mtools-4.0.44-memleaks/mpartition.c
+--- mtools-4.0.44/mpartition.c	2022-10-29 11:48:23.000000000 +0200
++++ mtools-4.0.44-memleaks/mpartition.c	2024-08-21 13:53:03.699524744 +0200
+@@ -483,6 +483,7 @@
+ 				perror("read MBR");
+ 				exit(1);
+ 			}
++			close(fd);
+ 		}
+ 		memset((char *)(partTable+1), 0, 4*sizeof(*partTable));
+ 		set_word(((unsigned char*)buf)+510, 0xaa55);

mtools.spec

@@ -8,6 +8,7 @@ Url: https://www.gnu.org/software/mtools/
 Patch0: mtools-3.9.6-config.patch
 Patch1: mtools-4.0.43-errmsgsize.patch
 Patch2: mtools-4.0.43-iconv_close.patch
+Patch3: mtools-4.0.43-close.patch
 
 BuildRequires: make
 BuildRequires: gcc
@@ -35,6 +36,7 @@ Mtools should be installed if you need to use MS-DOS disks
 %patch 0 -p1 -b .conf
 %patch 1 -p1
 %patch 2 -p1
+%patch 3 -p1
 
 %build
 autoreconf -fiv