Catch error throwing in matlab build

Author: Lee Carver

atmat/atmexall.m

@@ -149,7 +149,7 @@ function atmexall(varargin)
                 compile(compargs, pmeth);
             catch errcomp
                 if fail
-                    rethrow(err);
+                    rethrow(errcomp);
                 else
                     fprintf(2, 'Could not compile %s:\n%s\n', pmeth, errcomp.message);
                 end