Fix gl3 uniforms restore logic

[logzero]

gdebugger trace shows uniforms uploaded twice, which is not what we want.

glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_2D, 29) [Context 4 - Texture 29: Context 4 - Texture 29]
glActiveTexture(GL_TEXTURE1)
glBindTexture(GL_TEXTURE_2D, 30) [Context 4 - Texture 30: Context 4 - Texture 30]
glUniformMatrix4fv(2, 1, FALSE, {-0.64278769, -0.7660445, -2.7010078e-008, 0} {0.7660445, -0.64278769, 1.2595006e-008, 0} {-2.7010078e-008, -1.2595006e-008, 1, 0} {0.090082958, 0.51184475, 0.67502683, 1})
glUniform4f(0, 1, 1, 1, 1)
glUniformMatrix4fv(2, 1, FALSE, {-0.64278769, -0.7660445, -2.7010078e-008, 0} {0.7660445, -0.64278769, 1.2595006e-008, 0} {-2.7010078e-008, -1.2595006e-008, 1, 0} {0.090082958, 0.51184475, 0.67502683, 1})
glDrawRangeElements(GL_TRIANGLES, 6403, 7518, 4533, GL_UNSIGNED_INT, 0x0000000000018C30)