gcc-dev_unity_xtra warnings for Arx in branch 1.1.2-r2

• -Wcatch-value= [docs] (1)
• -Wshift-negative-value [docs] (1)
• -Wstringop-overflow= [docs] (1)
• -Wparentheses [docs] (2)
• -Wuninitialized [docs] (2)
• -Wdeprecated-declarations [docs] (5)
• -Wformat-overflow= [docs] (8)
• -Wimplicit-fallthrough= [docs] (12)
• -Wmisleading-indentation [docs] (12)
• -Wstrict-aliasing [docs] (17)
• -Wstringop-truncation [docs] (28)
• -Wmaybe-uninitialized [docs] (42)
• -Wdeprecated-copy [docs] (79)
• -Wclass-memaccess [docs] (161)