Fix build with -fno-common

Part of Patch from https://src.fedoraproject.org/rpms/xfce4-cpufreq-plugin/raw/master/f/xfce4-cpufreq-plugin-1.2.1-gcc10-common.patch

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>

Refresh for xfce4-cpufreq-plugin 1.2.2.

Signed-off-by: Kai Kang <kai.kang@windriver.com>

---
 panel-plugin/xfce4-cpufreq-plugin.c | 1 +
 panel-plugin/xfce4-cpufreq-plugin.h | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/panel-plugin/xfce4-cpufreq-plugin.c b/panel-plugin/xfce4-cpufreq-plugin.c
index 1e33492..ce9e302 100644
--- a/panel-plugin/xfce4-cpufreq-plugin.c
+++ b/panel-plugin/xfce4-cpufreq-plugin.c
@@ -38,6 +38,7 @@
 #endif /* __linux__ */
 
 CpuFreqPlugin *cpuFreq;
+GtkCssProvider *currentProvider;
 
 void
 cpufreq_label_set_font (void)
diff --git a/panel-plugin/xfce4-cpufreq-plugin.h b/panel-plugin/xfce4-cpufreq-plugin.h
index 8cd0d33..7dbccef 100644
--- a/panel-plugin/xfce4-cpufreq-plugin.h
+++ b/panel-plugin/xfce4-cpufreq-plugin.h
@@ -95,7 +95,7 @@ typedef struct
 
 extern CpuFreqPlugin *cpuFreq;
 
-GtkCssProvider *currentProvider;
+extern GtkCssProvider *currentProvider;
 
 G_BEGIN_DECLS