fix MSVC build failures in CI after commit 1e5e8e2f

src/audio/SDL_audiocvt.c

@@ -321,7 +321,7 @@ static int SDL_ResampleAudio(const int chans, const int inrate, const int outrat
                 const int srcframe = srcindex - j;
                 /* !!! FIXME: we can bubble this conditional out of here by doing a pre loop. */
                 const float insample = (srcframe < 0) ? lpadding[((paddinglen + srcframe) * chans) + chan] : inbuf[(srcframe * chans) + chan];
-                outsample += (insample * (ResamplerFilter[filterindex1 + (j * RESAMPLER_SAMPLES_PER_ZERO_CROSSING)] + (interpolation1 * ResamplerFilterDifference[filterindex1 + (j * RESAMPLER_SAMPLES_PER_ZERO_CROSSING)])));
+                outsample += (float) (insample * (ResamplerFilter[filterindex1 + (j * RESAMPLER_SAMPLES_PER_ZERO_CROSSING)] + (interpolation1 * ResamplerFilterDifference[filterindex1 + (j * RESAMPLER_SAMPLES_PER_ZERO_CROSSING)])));
             }
 
             /* Do the right wing! */
@@ -330,7 +330,7 @@ static int SDL_ResampleAudio(const int chans, const int inrate, const int outrat
                 const int srcframe = srcindex + 1 + j;
                 /* !!! FIXME: we can bubble this conditional out of here by doing a post loop. */
                 const float insample = (srcframe >= inframes) ? rpadding[((srcframe - inframes) * chans) + chan] : inbuf[(srcframe * chans) + chan];
-                outsample += (insample * (ResamplerFilter[filterindex2 + jsamples] + (interpolation2 * ResamplerFilterDifference[filterindex2 + jsamples])));
+                outsample += (float) (insample * (ResamplerFilter[filterindex2 + jsamples] + (interpolation2 * ResamplerFilterDifference[filterindex2 + jsamples])));
             }
 
             *(dst++) = outsample;