fix for SPIR-V sk_in definition which was upsetting Intel NUC

Bug: skia:7852
Change-Id: Ife747f3531d19e69dc70c2e0b9a9c6cfe001da72
Reviewed-on: https://skia-review.googlesource.com/125743
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Chris Dalton <csmartdalton@google.com>
diff --git a/src/sksl/SkSLSPIRVCodeGenerator.h b/src/sksl/SkSLSPIRVCodeGenerator.h
index 8f6dcd9..e7bec1e 100644
--- a/src/sksl/SkSLSPIRVCodeGenerator.h
+++ b/src/sksl/SkSLSPIRVCodeGenerator.h
@@ -340,6 +340,7 @@
     SpvId fRTHeightFieldIndex = (SpvId) -1;
     // holds variables synthesized during output, for lifetime purposes
     SymbolTable fSynthetics;
+    int fSkInCount = 1;
 
     friend class PointerLValue;
     friend class SwizzleLValue;