Enforce the drawbuffer overflow check in release too.

gfx_es2/draw_buffer.cpp

@@ -122,12 +122,10 @@ void DrawBuffer::Flush(bool set_blend_state) {
 }
 
 void DrawBuffer::V(float x, float y, float z, uint32 color, float u, float v) {
-#ifdef _DEBUG
 	if (count_ >= MAX_VERTS) {
 		FLOG("Overflowed the DrawBuffer");
 		return;
 	}
-#endif
 
 	Vertex *vert = &verts_[count_++];
 	vert->x = x;