Fix incorrect unused pragma.

From structureio#92

Signed-off-by: Chris Lalancette <[email protected]>

Author: clalancette

Include/OpenNI.h

@@ -84,8 +84,8 @@ typedef struct
 
 /** This special URI can be passed to @ref Device::open() when the application has no concern for a specific device. */
 #if ONI_PLATFORM != ONI_PLATFORM_WIN32
-#pragma GCC diagnostic ignored "-Wunused-variable"
 #pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-variable"
 #endif
 static const char* ANY_DEVICE = NULL;
 #if ONI_PLATFORM != ONI_PLATFORM_WIN32