[PATCH][StaticAnalyzer] new check comparing equal expression

[Per Viberg]

Hello,

please review attached patch. The patch adds a check that warns for comparison of equal expressions.

example:
x + 1 == x +1;

best regards,
Per

.......................................................................................................................
Per Viberg Senior Engineer
Evidente ES East AB  Warfvinges väg 34  SE-112 51 Stockholm  Sweden
Phone:    +46 (0)8 402 79 00
Mobile:    +46 (0)70 912 42 52
E-mail:     Per.Viberg at evidente.se

www.evidente.se
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