Do not mark as invalid UTF8 control codes
wcwidth() returns -1 for all the non visible characters, but it doesn't necessarilly mean that they are incorrect. It only means that they are not printable.
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							| @ -2895,15 +2895,15 @@ tputc(Rune u) | |||||||
| 	int width, len; | 	int width, len; | ||||||
| 	Glyph *gp; | 	Glyph *gp; | ||||||
|  |  | ||||||
|  | 	control = ISCONTROL(u); | ||||||
| 	len = utf8encode(u, c); | 	len = utf8encode(u, c); | ||||||
| 	if ((width = wcwidth(u)) == -1) { | 	if (!control && (width = wcwidth(u)) == -1) { | ||||||
| 		memcpy(c, "\357\277\275", 4); /* UTF_INVALID */ | 		memcpy(c, "\357\277\275", 4); /* UTF_INVALID */ | ||||||
| 		width = 1; | 		width = 1; | ||||||
| 	} | 	} | ||||||
|  |  | ||||||
| 	if (IS_SET(MODE_PRINT)) | 	if (IS_SET(MODE_PRINT)) | ||||||
| 		tprinter(c, len); | 		tprinter(c, len); | ||||||
| 	control = ISCONTROL(u); |  | ||||||
|  |  | ||||||
| 	/* | 	/* | ||||||
| 	 * STR sequence must be checked before anything else | 	 * STR sequence must be checked before anything else | ||||||
|  | |||||||
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