Add some parameter asserts in DitherEffect, too.

diff --git a/dither_effect.cpp b/dither_effect.cpp
index 1399c8196984c728ac148ea686f4ab9de504e403..305268e2396bc0e47c7404c385b1fa984ed0088e 100644 (file)
--- a/dither_effect.cpp
+++ b/dither_effect.cpp
@@ -85,6 +85,10 @@ void DitherEffect::set_gl_state(GLuint glsl_program_num, const std::string &pref
 {
        Effect::set_gl_state(glsl_program_num, prefix, sampler_num);
 
 {
        Effect::set_gl_state(glsl_program_num, prefix, sampler_num);
 

+       assert(width > 0);
+       assert(height > 0);
+       assert(num_bits > 0);
+

        if (width != last_width || height != last_height || num_bits != last_num_bits) {
                update_texture(glsl_program_num, prefix, sampler_num);
                last_width = width;
        if (width != last_width || height != last_height || num_bits != last_num_bits) {
                update_texture(glsl_program_num, prefix, sampler_num);
                last_width = width;