glResetHistogram — reset histogram table entries to zero
void glResetHistogram( | GLenum | target); | 
            glResetHistogram is present only if ARB_imaging is returned when glGetString
            is called with an argument of GL_EXTENSIONS.
        
            GL_INVALID_ENUM is generated if target is not GL_HISTOGRAM.
        
            GL_INVALID_OPERATION is generated if glResetHistogram is executed
            between the execution of glBegin and the corresponding
            execution of glEnd.
        
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