Fix warnings from clang and gcc: #2
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o include <stdint.h> for intptr_t o use intptr_t for storing both pointers and ints rather than int. o include <ctypes.h> for isspace() o tag all implicit returns as int or void o fix one bug where ECHO_ didn't step -- really a bug? o tag all functions that take no args as (void). o forward declare expr and err o fix some printf formats / castingo o add some explicit parens for assignment operators in if statements
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o include <stdint.h> for intptr_t
o use intptr_t for storing both pointers and ints rather than int.
o include <ctypes.h> for isspace()
o tag all implicit returns as int or void
o fix one bug where ECHO_ didn't step -- really a bug?
o tag all functions that take no args as (void).
o forward declare expr and err
o fix some printf formats / castingo
o add some explicit parens for assignment operators in if statements