Bugfix: use smb_close_fp() instead of fclose() to close files opened via

smb_open_* - prevents double close of FILE* causing segfault.

src/sbbs3/chksmb.c

@@ -535,12 +535,10 @@ int main(int argc, char **argv)
 		smb_freemsgmem(&msg); 
 	}
 
-	if(number)
-		FREE(number);
+	FREE_AND_NULL(number);
 
 	fprintf(stderr,"\r%79s\r100%%\n","");
 
-
 	if(chkalloc && !(smb.status.attr&SMB_HYPERALLOC)) {
 
 		fprintf(stderr,"\nChecking %s Data Blocks\n\n",smb.file);
@@ -557,8 +555,8 @@ int main(int argc, char **argv)
 				deldatblocks++; 
 		}
 
-		fclose(smb.sha_fp);
-		fclose(smb.sda_fp);
+		smb_close_ha(&smb);
+		smb_close_da(&smb);
 
 		fprintf(stderr,"\r%79s\r100%%\n",""); 
 	}
@@ -640,8 +638,8 @@ int main(int argc, char **argv)
 		}
 		fprintf(stderr,"\r%79s\r100%%\n",""); 
 	}
-	FREE(number);
-	FREE(offset);
+	FREE_AND_NULL(number);
+	FREE_AND_NULL(offset);
 
 	}	/* if(total) */