iniWriteFile(): don't truncate the file to 0-bytes before writing the contents,

instead truncate to the new length after writing the contents. This should
make .ini files more tolerate of "out of disk space" situations and reduce
the risk of lost data (0-byte .ini files) due to low/no disk space.

src/xpdev/ini_file.c

@@ -2361,11 +2361,10 @@ BOOL DLLCALL iniWriteFile(FILE* fp, const str_list_t list)
 	size_t		count;
 
 	rewind(fp);
-
-	if(chsize(fileno(fp),0)!=0)	/* truncate */
-		return(FALSE);
-
 	count = strListWriteFile(fp,list,"\n");
+	fflush(fp);
+	if(chsize(fileno(fp), ftell(fp))!=0)	/* truncate */
+		return(FALSE);
 
 	return(count == strListCount(list));
 }