VS2010 buildfixes.

The main issue was mostly that we have to build C files as C++ in some
cases, and extern "C" wasn't being used everywhere, so linker errors
popped up. The rest is the usual tedious VS2010 stuff like casting void*
to other stuff, so this commit as a whole is pretty boring!

desktop_version/src/CWrappers.h

@@ -1,7 +1,17 @@
 #ifndef CWRAPPERS_H
 #define CWRAPPERS_H
 
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
 char* HELP_number_words(int _t);
 uint32_t LOC_toupper_ch(uint32_t ch);
 
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
 #endif /* CWRAPPERS_H */