CMake: Do just one build with -Werror in workflow.

.github/workflows/cmake.yml

@@ -11,59 +11,59 @@ jobs:
           - name: Ubuntu GCC
             os: ubuntu-latest
             compiler: gcc
-            cflags: -Werror -Wall -Wextra
+            cflags: -Wall -Wextra
 
           # Test out of source builds
           - name: Ubuntu GCC OSB
             os: ubuntu-latest
             compiler: gcc
-            cflags: -Werror -Wall -Wextra
+            cflags: -Wall -Wextra
             build-dir: ../build
             src-dir: ../zlib
 
           - name: Ubuntu GCC -O3
             os: ubuntu-latest
             compiler: gcc
-            cflags: -O3 -Werror -Wall -Wextra
+            cflags: -O3 -Wall -Wextra
 
           - name: Ubuntu Clang
             os: ubuntu-latest
             compiler: clang
-            cflags: -Werror -Wall -Wextra
+            cflags: -Wall -Wextra
 
           - name: Ubuntu Clang Debug
             os: ubuntu-latest
             compiler: clang
-            cflags: -Werror -Wall -Wextra
+            cflags: -Wall -Wextra
             build-config: Debug
 
           - name: Windows MSVC Win32
             os: windows-latest
             compiler: cl
-            cflags: /WX /W3
+            cflags: /W3
             cmake-args: -A Win32
 
           - name: Windows MSVC Win64
             os: windows-latest
             compiler: cl
-            cflags: /WX /W3
+            cflags: /W3
             cmake-args: -A x64
 
           - name: Windows GCC
             os: windows-latest
             compiler: gcc
-            cflags: -Werror -Wall -Wextra
+            cflags: -Wall -Wextra
             cmake-args: -G Ninja
 
           - name: macOS Clang
             os: macos-latest
             compiler: clang
-            cflags: -Werror -Wall -Wextra
+            cflags: -Wall -Wextra
 
           - name: macOS GCC
             os: macos-latest
             compiler: gcc-12
-            cflags: -Werror -Wall -Wextra
+            cflags: -Wall -Wextra
 
     steps:
     - name: Checkout repository