Speedup in code_resampler - avoid floor function

Direct cast to integer takes the floor anyway.

src/algorithms/libs/code_resampler.h

@@ -112,7 +112,7 @@ public:
 
                 for( ; j < num_samples_this_iter; ++j )
                 {
-                    associated_chip_index = std::floor(tcode_chips);
+                    associated_chip_index = static_cast< int >(tcode_chips);
                     *curr_sample = orig_code[associated_chip_index];
                     tcode_chips += code_phase_step;
                     ++curr_sample;