Initialized CMake variables for configure as 0

Init INCLUDE_INTTYPES_H, INCLUDE_STDINT_H, INCLUDE_SYS_TYPES_H, CMake variables as 0

It is need to prevent generate broken code in config_types.h
So next code was genarated before

#define INCLUDE_INTTYPES_H
...
#if INCLUDE_INTTYPES_H
...
#endif

And got error: expected value in expression

Author: botanegg

CMakeLists.txt

@@ -51,6 +51,9 @@ endfunction()
 message(STATUS "Configuring ${PROJECT_NAME} ${PROJECT_VERSION}")
 
 # Configure config_type.h
+set(INCLUDE_INTTYPES_H 0)
+set(INCLUDE_STDINT_H 0)
+set(INCLUDE_SYS_TYPES_H 0)
 check_include_files(inttypes.h INCLUDE_INTTYPES_H)
 check_include_files(stdint.h INCLUDE_STDINT_H)
 check_include_files(sys/types.h INCLUDE_SYS_TYPES_H)