Fix 2 bugs on matfaust proxs: one concerning 'const' prox and the second all...

Fix 2 bugs on matfaust proxs: one concerning 'const' prox and the second all proxs but only for complex matrices.

wrapper/matlab/+matfaust/+factparams/@ConstraintGeneric/ConstraintGeneric.m

@@ -31,7 +31,7 @@ classdef (Abstract) ConstraintGeneric
 			if(isreal(M))
 				pM = mexFaustReal('prox', M, this.name.name, this.param);
 			else
-				mexFaustCplx('prox', M, this.name.name, this.param);
+				pM = mexFaustCplx('prox', M, this.name.name, this.param);
 			end
 		end
 	end

wrapper/matlab/src/mexFaust.cpp.in

@@ -227,7 +227,6 @@ void save(Faust::TransformHelper<SCALAR,Cpu>* core_ptr, int nargs, const mxArray
 				}
 
 
-				cout << "mex prox, scal_param: " << scal_param << " constraint id: " << constraint_type << endl;
 				switch(constraint_type)
 				{
 					case CONSTRAINT_NAME_SP: /*!< fixed number of non zero elements, INT (frobenius norm 1) */
@@ -252,7 +251,7 @@ void save(Faust::TransformHelper<SCALAR,Cpu>* core_ptr, int nargs, const mxArray
 						Faust::prox_normcol(mat, scal_param);
 						break;
 					case CONSTRAINT_NAME_CONST: /**< Matrix equal to A ; MAT */
-						// nothing to do, same mat returned 
+						mat = *mat_param;
 						break	;
 					case CONSTRAINT_NAME_BLKDIAG:
 						//not impl. yet in cpp core