getfont() can return -1.

Deal with that fact.

src/conio/ciolib.c

@@ -1032,6 +1032,7 @@ CIOLIBEXPORT int CIOLIBCALL ciolib_puttext(int a,int b,int c,int d,void *e)
 
 	if(ciolib_xlat) {
 		font = ciolib_getfont();
+		if (font >= 0) {
 			buf=malloc((c-a+1)*(d-b+1)*2);
 			if (conio_fontdata[font].put_xlat == NULL) {
 				memcpy(buf, e, (c-a+1)*(d-b+1)*2);
@@ -1046,8 +1047,9 @@ CIOLIBEXPORT int CIOLIBCALL ciolib_puttext(int a,int b,int c,int d,void *e)
 				}
 			}
 		}
+	}
 	ret = cio_api.puttext(a,b,c,d,(void *)buf);
-	if (ciolib_xlat)
+	if (buf != e)
 		free(buf);
 	return ret;
 }
@@ -1065,6 +1067,7 @@ CIOLIBEXPORT int CIOLIBCALL ciolib_gettext(int a,int b,int c,int d,void *e)
 	ret = cio_api.gettext(a,b,c,d,e);
 	if(ciolib_xlat) {
 		font = ciolib_getfont();
+		if (font >= 0) {
 			if (conio_fontdata[font].put_xlat) {
 				for (i=0; i<(c-a+1)*(d-b+1)*2; i+=2) {
 					xlat = ((char *)e)[i];
@@ -1076,6 +1079,7 @@ CIOLIBEXPORT int CIOLIBCALL ciolib_gettext(int a,int b,int c,int d,void *e)
 				}
 			}
 		}
+	}
 	return ret;
 }