free return value of dirname()
free memory used by breakpoints
remove cast

C99+TC3, 7.19.7.1p2: [...] the fgetc function obtains that character as
an unsigned char converted to an int [...]
don't convert function pointer to object pointer
remove const type qualifier

clang 3.5.0 with -Wextra produces a -Wignored-qualifiers diagnostic.
add missing null-termination
remove unnecessary _WIN32 preprocessor check

SIZE_MAX < UINT32_MAX is false on Win32 / Win64.
Merge pull request #2653 from cremno/remove-unnecessary-_win32-preprocessor-check

remove unnecessary _WIN32 preprocessor check
Merge pull request #2644 from cremno/mrdb-minor-changes

mrdb: minor changes
Merge pull request #2646 from cremno/mrdb-fix-memory-leaks

mrdb: fix two memory leaks
free return value of dirname()
free memory used by breakpoints
OP_APOST local variable display was wrong
wrong register number adjustment in multiple assignment; fix #2654
Merge branch 'master' of github.com:mruby/mruby
fix(String) String#[] accepts float; close #2650 #2651
add "fall through" comment
Merge branch 'master' of github.com:mruby/mruby
Merge pull request #2652 from cremno/mrdb-add-missing-null-termination

mrdb: add missing null-termination
Fix: Numeric#step infinite loop.