.travis.yml

@@ -7,20 +7,20 @@ jobs:
     - name: "Linux Clang"
       os: linux
       compiler: clang
-#    - name: "Mac OS X Clang"
-#      os: osx
-#      compiler: clang
+    - name: "Mac OS X Clang"
+      os: osx
+      compiler: clang
 
 addons:
   apt:
     packages:
       - libexpat1-dev
       - libminizip-dev
-#  homebrew:
-#    packages:
-#      - expat
-#      - minizip
-##      - minizip2
+  homebrew:
+    packages:
+      - expat
+      - minizip
+#      - minizip2
 
 script:
   - make install CC=$CC PREFIX=$(pwd)/build_result

lib/xlsxio_write.c

@@ -857,7 +857,7 @@ void write_cell_data (xlsxiowriter handle, const char* rowattr, const char* pref
   if (handle->sheetopen) {
     //write cell data
     if (prefix)
-      fprintf(handle->pipe_write, "%s", prefix COLNRPARAM(handle));
+      fprintf(handle->pipe_write, prefix COLNRPARAM(handle));
     if (data)
       fprintf(handle->pipe_write, "%s", data);
     if (suffix)