glsl: fix compiling warning from gcc 4.7

ir_validate.cpp: In member function ‘virtual ir_visitor_status ir_validate::visit_leave(ir_swizzle*)’:
ir_validate.cpp:458:66: warning: narrowing conversion of ‘ir->ir_swizzle::mask.ir_swizzle_mask::x’ from ‘unsigned int’ to ‘int’ inside { } is ill-formed in C++11 [-Wnarrowing]
ir_validate.cpp:458:66: warning: narrowing conversion of ‘ir->ir_swizzle::mask.ir_swizzle_mask::y’ from ‘unsigned int’ to ‘int’ inside { } is ill-formed in C++11 [-Wnarrowing]
ir_validate.cpp:458:66: warning: narrowing conversion of ‘ir->ir_swizzle::mask.ir_swizzle_mask::z’ from ‘unsigned int’ to ‘int’ inside { } is ill-formed in C++11 [-Wnarrowing]
ir_validate.cpp:458:66: warning: narrowing conversion of ‘ir->ir_swizzle::mask.ir_swizzle_mask::w’ from ‘unsigned int’ to ‘int’ inside { } is ill-formed in C++11 [-Wnarrowing]

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

diff --git a/src/glsl/ir_validate.cpp b/src/glsl/ir_validate.cpp
index 20a0377..101d999 100644 (file)
--- a/src/glsl/ir_validate.cpp
+++ b/src/glsl/ir_validate.cpp
@@ -455,7 +455,7 @@ ir_validate::visit_leave(ir_expression *ir)
 ir_visitor_status
 ir_validate::visit_leave(ir_swizzle *ir)
 {
-   int chans[4] = {ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w};
+   unsigned int chans[4] = {ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w};
 
    for (unsigned int i = 0; i < ir->type->vector_elements; i++) {
       if (chans[i] >= ir->val->type->vector_elements) {