Fixes bug with printf formatting of zero filled fields

src/gfile/gfile_printg.c

@@ -90,7 +90,7 @@ int vfnprintg(GFILE *f, int maxlen, const char *fmt, va_list arg) {
 			fmt++;
 			left_align = TRUE;
 		}
-		if (*fmt == '.') {
+		if (*fmt == '0') {
 			fmt++;
 			filler = '0';
 		}

src/gwin/gwin_console.c

@@ -684,7 +684,7 @@ void gwinPrintf(GHandle gh, const char *fmt, ...) {
 			left_align = TRUE;
 		}
 		filler = ' ';
-		if (*fmt == '.') {
+		if (*fmt == '0') {
 			fmt++;
 			filler = '0';
 		}