Add warn log when falling back to xor texture

gfx/texture.cpp

@@ -113,6 +113,7 @@ bool Texture::Load(const char *filename) {
 	if (!strcmp("png", &name[len-3]) ||
 		!strcmp("PNG", &name[len-3])) {
 			if (!LoadPNG(fn)) {
+				WLOG("WARNING: Failed to load .png %s, falling back to ugly gray XOR pattern!", fn);
 				LoadXOR();
 				return false;
 			} else {
@@ -124,6 +125,7 @@ bool Texture::Load(const char *filename) {
 		if (LoadZIM(name)) {
 			return true;
 		} else {
+			WLOG("WARNING: Failed to load .zim texture %s, falling back to ugly gray XOR pattern!", fn);
 			LoadXOR();
 			return false;
 		}

gfx_es2/draw_buffer.cpp

@@ -120,6 +120,13 @@ void DrawBuffer::Flush(const GLSLProgram *program, 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;
 	vert->y = y;