wscript: disallow int-conversion

wscript

@@ -132,8 +132,20 @@ def configure(conf):
 		'common': {
 			# disable thread-safe local static initialization for C++11 code, as it cause crashes on Windows XP
 			'msvc':    ['/D_USING_V110_SDK71_', '/Zi', '/FS', '/Zc:threadSafeInit-', '/MT'],
-			'clang':   ['-g', '-gdwarf-2', '-Werror=implicit-function-declaration', '-Werror=return-type'],
-			'gcc':     ['-g', '-Werror=implicit-function-declaration', '-fdiagnostics-color=always', '-Werror=return-type']
+			'clang': [
+				'-g',
+				'-gdwarf-2',
+				'-Werror=implicit-function-declaration',
+				'-Werror=return-type',
+				'-Werror=int-conversion'
+			],
+			'gcc': [
+				'-g',
+				'-fdiagnostics-color=always',
+				'-Werror=implicit-function-declaration',
+				'-Werror=return-type',
+				'-Werror=int-conversion'
+			]
 		},
 		'fast': {
 			'msvc':    ['/O2', '/Oy'], #todo: check /GL /LTCG