Bash-5.3 patch 4: fix issue with source when read(2) returns fewer characters than fstat(2) says are available

builtins/evalfile.c

@@ -160,8 +160,10 @@ file_error_and_exit:
       nr = read (fd, string, file_size);
       if (nr >= 0)
 	string[nr] = '\0';
+#if 0
       if (nr != file_size)
 	nr = -1;		/* XXX - didn't get the whole file */
+#endif
     }
   else
     nr = zmapfd (fd, &string, 0);

patchlevel.h

@@ -25,6 +25,6 @@
    regexp `^#define[ 	]*PATCHLEVEL', since that's what support/mkversion.sh
    looks for to find the patch level (for the sccs version string). */
 
-#define PATCHLEVEL 3
+#define PATCHLEVEL 4
 
 #endif /* _PATCHLEVEL_H_ */