correct 'this ‘if’ clause does not guard' error when using make

[webbed88]

When attempting to build on Fedora 24 using

make install
make

The following errors would be displayed:

mydumper.c: In function ‘process_queue’:
mydumper.c:407:5: error: this ‘if’ clause does not guard... [-Werror=misleading-indentation]
     if (defaults_file != NULL)
     ^~
mydumper.c:409:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’

This commit resolves all instances of this error, and allows the build to complete.