sanitize the descriptive text displayed for "varFuncNullUB"
Fixed #4429 (unused functions: handle function declarations better)
Use Token::simpleMatch() for simple pattern

"internal" check reported:
[lib/symboldatabase.cpp:945]: (warning) Found simple pattern inside Token::Match() call: "> ("
Simplify token string access

"internal" check reported:
[lib/tokenize.cpp:6671]: (style) Call to 'Token::tokAt()' followed by 'Token::str()' can be simplified.
fix unit test for varFuncNullUB
Merge pull request #127 from rofl0r/master

sanitize the descriptive text displayed for "varFuncNullUB"
Unused functions: Fixed invalid pattern match
Fix compiler warnings and comment/string typos

- fix g++ warning:

> lib/checkother.cpp:3779: warning: comparison between signed and unsigned integer expressions

 - fix suncc warning (see [everything2](http://everything2.com/title/C%252B%252B%253A+static+extern+%2522C%2522)):

> "lib/checkmemoryleak.cpp", line 578: Warning (Anachronism): Formal argument __compar of type extern "C" int(*)(const void*,const void*) in call to bsearch(const void*, const void*, unsigned long, unsigned long, extern "C" int(*)(const void*,const void*)) is being passed int(*)(const void*,const void*).

- prefer empty() / isEmpty() over "size() > 0" (cases not caught by stlSize)

- fix word misspellings (mostly comments, a few output lines)

  - Parenthesis => Parentheses (both variations were used in the codebase)

  - fix typo and wording ("never alwayw") in gui/test/data/benchmark/simple.cpp's CheckOther::unsignedPositive():

```
-  "An unsigned variable will never alwayw be positive so it is either pointless or "
+  "An unsigned variable can't be negative so it is either pointless or "
```
Fixed #4490 (False positive: unused function (function pointer is taken in global scope))
Merge pull request #128 from acmyo/master

Fix compiler warnings and comment/string typos