ICU-1008 Fix for when threads are not wanted.

X-SVN-Rev: 6458

icu4c/source/common/umutex.c

@@ -68,6 +68,8 @@
 #include "umutex.h"
 #include "cmemory.h"
 
+#if (ICU_USE_THREADS == 1)
+
 /* the global mutex. Use it proudly and wash it often. */
 static UMTX    gGlobalMutex = NULL;
 
@@ -78,6 +80,7 @@ static CRITICAL_SECTION gPlatformMutex;
 static pthread_mutex_t gPlatformMutex;
 
 #endif
+#endif /* ICU_USE_THREADS==1 */
 
 void umtx_lock(UMTX *mutex)
 {