fix broken __postDecr()

diff --git a/src/mesa/shader/slang/library/slang_core.gc b/src/mesa/shader/slang/library/slang_core.gc
index 0c45515163eda07beb3dbb7b5b1b30b4ec48135c..25afccf13fad0b380c85ffdbdd0b75572dd75176 100644 (file)
--- a/src/mesa/shader/slang/library/slang_core.gc
+++ b/src/mesa/shader/slang/library/slang_core.gc
@@ -2333,8 +2333,8 @@ ivec4 __postDecr(inout ivec4 v)
 
 float __postDecr(inout float a)
 {
-   __retVal = v;
-   v = v - 1.0;
+   __retVal = a;
+   a = a - 1.0;
 }
 
 vec2 __postDecr(inout vec2 v)