Some more uninitialized variables.

Originally committed to SVN as r2491.

aegisub/base_grid.cpp

@@ -62,6 +62,7 @@ BaseGrid::BaseGrid(wxWindow* parent, wxWindowID id, const wxPoint& pos, const wx
 	extendRow = -1;
 	bmp = NULL;
 	holding = false;
+	byFrame = false;
 
 	// Set scrollbar
 	scrollBar = new wxScrollBar(this,GRID_SCROLLBAR,wxDefaultPosition,wxDefaultSize,wxSB_VERTICAL);

aegisub/video_slider.cpp

@@ -53,6 +53,9 @@
 VideoSlider::VideoSlider (wxWindow* parent, wxWindowID id)
 : wxWindow (parent,id,wxDefaultPosition,wxDefaultSize,wxWANTS_CHARS | wxFULL_REPAINT_ON_RESIZE)
 {
+	val = 0;
+	min = 0;
+	max = 1;
 	Display = NULL;
 	SetClientSize(20,25);
 	locked = false;