devvga: re-render text from kmesg after resize

sys/src/9/pc/vga.c

@@ -217,6 +217,8 @@ vgascreenwin(VGAscr* scr)
 
 	qunlock(&drawlock);
 
+	vgascreenputs(kmesg.buf, kmesg.n);
+
 	screenputs = vgascreenputs;
 }
 

sys/src/9/port/devcons.c

@@ -63,16 +63,6 @@ prflush(void)
 			break;
 }
 
-/*
- * Log console output so it can be retrieved via /dev/kmesg.
- * This is good for catching boot-time messages after the fact.
- */
-struct {
-	Lock lk;
-	char buf[16384];
-	uint n;
-} kmesg;
-
 static void
 kmesgputs(char *str, int n)
 {

sys/src/9/port/portdat.h

@@ -991,3 +991,13 @@ enum
 #pragma	varargck	type	"V"	uchar*
 #pragma	varargck	type	"E"	uchar*
 #pragma	varargck	type	"M"	uchar*
+
+/*
+ * Log console output so it can be retrieved via /dev/kmesg.
+ * This is good for catching boot-time messages after the fact.
+ */
+struct {
+	Lock lk;
+	uint n;
+	char buf[16384];
+} kmesg;