Fixed a charmap warning with the new RGBDS

mobile/mobile_46.asm

@@ -1484,7 +1484,8 @@ Function118b9a:
 	and a
 	ret
 
-	charmap " ", $20 ; revert to ascii
+	pushc
+	setcharmap ascii ; revert to ascii
 
 ExchangeDownloadURL:
 	db "http://gameboy.datacenter.ne.jp/cgb/download?name=/01/CGB-BXTJ/exchange/index.txt", 0
@@ -1501,6 +1502,8 @@ MenuDownloadURL:
 IndexDownloadURL:
 	db "http://gameboy.datacenter.ne.jp/cgb/download?name=/01/CGB-BXTJ/tamago/index.txt", 0
 
+	popc
+
 Unreferenced_Function118d35:
 	ld hl, $d200
 	ld a, [wcd38]
@@ -2918,6 +2921,9 @@ Function119694:
 	jr nz, .asm_119699
 	ret
 
+pushc
+setcharmap ascii
+
 Unknown_1196b8:
 	db "Mon"
 	db "Tue"
@@ -2927,6 +2933,7 @@ Unknown_1196b8:
 	db "Sat"
 	db "Sun"
 
+popc
 
 SECTION "Mobile 46 ASCII", ROMX
 ; A hack to use ascii above.