colorxlate: squash some -Wconversion warnings

By design, these calculations cannot overflow.

diff --git a/lib/common/colxlate.c b/lib/common/colxlate.c
index e9f2d9178a7bb43af6e5c5b39c985d4bfedac26d..8aa6c5695206e085360793b733edd3cafe7f1771 100644 (file)
--- a/lib/common/colxlate.c
+++ b/lib/common/colxlate.c
@@ -271,10 +271,10 @@ int colorxlate(char *str, gvcolor_t * color, color_type_t target_type)
            color->u.HSVA[3] = A;
            break;
        case RGBA_BYTE:
-           color->u.rgba[0] = r;
-           color->u.rgba[1] = g;
-           color->u.rgba[2] = b;
-           color->u.rgba[3] = a;
+           color->u.rgba[0] = (unsigned char)r;
+           color->u.rgba[1] = (unsigned char)g;
+           color->u.rgba[2] = (unsigned char)b;
+           color->u.rgba[3] = (unsigned char)a;
            break;
        case CMYK_BYTE:
            R = (double) r / 255.0;
@@ -287,10 +287,10 @@ int colorxlate(char *str, gvcolor_t * color, color_type_t target_type)
            color->u.cmyk[3] = (int) K *255;
            break;
        case RGBA_WORD:
-           color->u.rrggbbaa[0] = r * 65535 / 255;
-           color->u.rrggbbaa[1] = g * 65535 / 255;
-           color->u.rrggbbaa[2] = b * 65535 / 255;
-           color->u.rrggbbaa[3] = a * 65535 / 255;
+           color->u.rrggbbaa[0] = (int)(r * 65535 / 255);
+           color->u.rrggbbaa[1] = (int)(g * 65535 / 255);
+           color->u.rrggbbaa[2] = (int)(b * 65535 / 255);
+           color->u.rrggbbaa[3] = (int)(a * 65535 / 255);
            break;
        case RGBA_DOUBLE:
            color->u.RGBA[0] = (double) r / 255.0;