Fix some build warnings

[remicollet]

At least first commit seems a real problem
I dont know is change from int / size_t is related to some libcurl version, but at least already size_t in 7.29 on RHEL 7

[remicollet]

Remains:

In file included from /usr/include/php/Zend/zend.h:27,
                 from /usr/include/php/main/php.h:31,
                 from /work/GIT/pecl-and-ext/http/src/php_http_api.h:31,
                 from /work/GIT/pecl-and-ext/http/src/php_http_querystring.c:13:
/work/GIT/pecl-and-ext/http/src/php_http_querystring.c: In function 'php_http_querystring_update':
/usr/include/php/Zend/zend_types.h:1174:16: warning: 'zv.value.counted' may be used uninitialized in this function [-Wmaybe-uninitialized]
 1174 |         return --(p->refcount);
      |                ^~~~~~~~~~~~~~~
/work/GIT/pecl-and-ext/http/src/php_http_querystring.c:251:22: note: 'zv.value.counted' was declared here
  251 |                 zval zv, *params_entry, *qarray_entry;
      |                      ^~

And

/work/GIT/pecl-and-ext/http/src/php_http_url.c: In function 'php_http_url_parse':
/work/GIT/pecl-and-ext/http/src/php_http_url.c:1825:25: warning: '%s' directive argument is null [-Wformat-overflow=]
 1825 |                         php_error_docref(NULL, E_WARNING, "Failed to parse URL scheme: '%s'", state->ptr);
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[codecov]

Codecov Report

Merging #124 (1e6aa1b) into master (4ca2476) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #124   +/-   ##
=======================================
  Coverage   85.39%   85.39%           
=======================================
  Files          42       42           
  Lines        9291     9291           
=======================================
  Hits         7934     7934           
  Misses       1357     1357           

Impacted Files	Coverage Δ
src/php_http_message.c	87.59% <ø> (ø)
src/php_http_client_curl.c	81.40% <100.00%> (ø)

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[m6w6]

/work/GIT/pecl-and-ext/http/src/php_http_querystring.c:251:22: note: 'zv.value.counted' was declared here
  251 |                 zval zv, *params_entry, *qarray_entry;
      |                      ^~

Looks like a false positive? There's a ZVAL_NULL right below:

ext-http/src/php_http_querystring.c

Line 253 in 4ca2476

ZVAL_NULL(&zv);

And

/work/GIT/pecl-and-ext/http/src/php_http_url.c:1825:25: warning: '%s' directive argument is null [-Wformat-overflow=]
 1825 |                         php_error_docref(NULL, E_WARNING, "Failed to parse URL scheme: '%s'", state->ptr);
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Ugh, yeah, while this function is never called with NULL, nobody did tell that to the compiler, so technically valid, I guess.