fix status line dsplay when scrolling

core/irq_handler.d

@@ -1,2 +0,0 @@
-core/irq_handler.o: core/irq_handler.c core/interrupt.h core/types.h \
- core/io.h core/irq.h drivers/pic.h drivers/vga.h

drivers/vga.c

@@ -81,7 +81,7 @@ void vgaScrollUp(void)
 		       VGA_WIDTH * sizeof(short));
 	}
 	for (int i = 0; i < VGA_WIDTH; i++) {
-		vga[(VGA_HEIGHT - 1) * VGA_WIDTH + i] = colorAttr;
+		vga[(VGA_HEIGHT - 2) * VGA_WIDTH + i] = colorAttr;
 	}
 }
 
@@ -97,7 +97,7 @@ void printChar(const char str)
 	if (str == '\n') {
 		line++;
 		col = 0;
-		if (line >= VGA_HEIGHT) {
+		if (line >= VGA_HEIGHT - 1) {
 			vgaScrollUp();
 			line--;
 		}
@@ -122,7 +122,7 @@ void printChar(const char str)
 			col = 0;
 			line++;
 		}
-		if (line >= VGA_HEIGHT) {
+		if (line >= VGA_HEIGHT - 1) {
 			vgaScrollUp();
 			line--;
 		}