Moved png lib C symbols into juce namespace.

modules/juce_graphics/image_formats/pnglib/png.h

@@ -467,11 +467,6 @@
 
 #ifndef PNG_VERSION_INFO_ONLY
 
-/* Inhibit C++ name-mangling for libpng functions but not for system calls. */
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
 /* Version information for C files, stored in png.c.  This had better match
  * the version above.
  */
@@ -3292,10 +3287,6 @@ PNG_EXPORT(244, int, png_set_option, (png_structrp png_ptr, int option,
   PNG_EXPORT_LAST_ORDINAL(244);
 #endif
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif /* PNG_VERSION_INFO_ONLY */
 /* Do not put anything past this line */
 #endif /* PNG_H */

modules/juce_graphics/image_formats/pnglib/pngpriv.h

@@ -720,11 +720,6 @@ PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]);
 #endif /* PNG_SIMPLIFIED_READ/WRITE */
 
 
-/* Inhibit C++ name-mangling for libpng functions but not for system calls. */
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
 /* Internal functions; these are not exported from a DLL however because they
  * are used within several of the C source files they have to be C extern.
  *
@@ -1905,9 +1900,5 @@ PNG_INTERNAL_FUNCTION(void, PNG_FILTER_OPTIMIZATIONS, (png_structp png_ptr,
 
 //#include "pngdebug.h"
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif /* PNG_VERSION_INFO_ONLY */
 #endif /* PNGPRIV_H */