Rearranged some error-catching code.

modules/juce_core/juce_core.h

@@ -26,6 +26,15 @@
 #ifndef __JUCE_CORE_JUCEHEADER__
 #define __JUCE_CORE_JUCEHEADER__
 
+/* This line is here as a sanity-check to catch syntax errors caused by mistakes in 3rd-party
+   header files that have been included prior to this one. If you hit an error at this line,
+   there's probably some kind of syntax problem in whatever code immediately precedes this header.
+
+   It also causes an error if you attempt to build using a C or obj-C compiler rather than a C++ one.
+*/
+namespace DummyNamespaceStatementToCatchSyntaxErrors {}
+
+//==============================================================================
 #include "system/juce_TargetPlatform.h"
 
 //=============================================================================

modules/juce_core/system/juce_TargetPlatform.h

@@ -39,15 +39,6 @@
     - Either JUCE_GCC or JUCE_MSVC
 */
 
-//==============================================================================
-/* This line is here as a sanity-check to catch syntax errors caused by mistakes in 3rd-party
-   header files that have been included before this one. If you hit an error at this line, there
-   must be some kind of syntax problem in whatever code immediately precedes this header.
-
-   It also causes an error if you attempt to build using a C or obj-C compiler rather than a C++ one.
-*/
-namespace JuceDummyNamespace {}
-
 //==============================================================================
 #if (defined (_WIN32) || defined (_WIN64))
   #define       JUCE_WIN32 1