worflow: fixes to os case switch in shader build script

scripts/build_sokol_demo.sh

@@ -19,9 +19,7 @@ if [ -f "$path_system_details" ]; then
     CoreCount_Physical=$(grep "PhysicalCores" "$path_system_details" | cut -d'=' -f2)
     CoreCount_Logical=$(grep "LogicalCores" "$path_system_details" | cut -d'=' -f2)
 else
-    # Detect the operating system
     OS=$(uname -s)
-
     case "$OS" in
         Darwin*)
             # macOS-specific commands

scripts/build_sokol_library.sh

@@ -36,9 +36,7 @@ fi
 
 pushd "$path_sokol"
 
-# Detect the operating system
 OS=$(uname -s)
-
 case "$OS" in
     Linux*)
         echo "Detected Linux operating system"

scripts/compile_sokol_shaders.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+OS=$(uname -s)
+
 path_root="$(git rev-parse --show-toplevel)"
 path_backend="$path_root/backend"
 path_scripts="$path_root/scripts"
@@ -13,6 +15,11 @@ case "$OS" in
     Linux*)
         sokol_shdc="$path_sokol_tools/bin/linux/sokol-shdc"
         ;;
+    *)
+        echo "Unsupported operating system: $OS"
+        CoreCount_Physical=1
+        CoreCount_Logical=1
+        ;;
 esac
 echo "Using sokol-shdc: $sokol_shdc"
 chmod +x "$sokol_shdc"