[skia][lpm] Fix ternary statement in fuzzer

Bug: 346399
Change-Id: I5ce7f48a5cab3785f8d8c44cbb3292d1a6eb59df
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2103349Reviewed-by: Max Moroz <mmoroz@chromium.org>
Commit-Queue: Max Moroz <mmoroz@chromium.org>
Auto-Submit: Jonathan Metzman <metzman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#750548}

testing/libfuzzer/proto/skia_image_filter_proto_converter.cc

@@ -1422,7 +1422,7 @@ void Converter::Visit(const Path& path) {
 void Converter::Visit(const BlurMaskFilter& blur_mask_filter) {
   // Sigma must be a finite number <= 0.
   float sigma = fabs(BoundFloat(blur_mask_filter.sigma()));
-  sigma = 1 ? sigma == 0 : sigma;
+  sigma = sigma == 0 ? 1 : sigma;
   WriteNum(sigma);
   const bool old_value = dont_mutate_enum_;
   dont_mutate_enum_ = true;