glsl: disallow incompatible matrices multiplication
glsl 4.4 spec section '5.9 expressions':
"The operator is multiply (*), where both operands are matrices or one operand is a vector and the other a matrix. A right vector operand is treated as a column vector and a left vector operand as a row vector. In all these cases, it is required that the number of columns of the left operand is equal to the number of rows of the right operand. Then, the multiply (*) operation does a linear algebraic multiply, yielding an object that has the same number of rows as the left operand and the same number of columns as the right operand. Section 5.10 “Vector and Matrix Operations” explains in more detail how vectors and matrices are operated on."
This fix disallows a multiplication of incompatible matrices like:
mat4x3(..) * mat4x3(..) mat4x2(..) * mat4x2(..) mat3x2(..) * mat3x2(..) ....
Signed-off-by: Andrii Simiklit firstname.lastname@example.org